Samba Samba is the standard Windows interoperability suite of programs for Linux and Unix.

Known Exploited Samba Vulnerabilities

The following Samba vulnerabilities have been marked by CISA as Known to be Exploited by threat actors.

The vulnerability CVE-2017-7494: Samba Remote Code Execution Vulnerability is in the top 1% of the currently known exploitable vulnerabilities.

By the Year

In 2025 there have been 8 vulnerabilities in Samba with an average score of 7.0 out of ten. Last year, in 2024 Samba had 1 security vulnerability published. That is, 7 more vulnerabilities have already been reported in 2025 as compared to last year. Last year, the average CVE base score was greater by 0.55

Recent Samba Security Vulnerabilities

CVE	Date	Vulnerability	Products
CVE-2025-10230	Nov 07, 2025	Samba WINS Hook RCE via Unvalidated NetBIOS Names A flaw was found in Samba, in the front-end WINS hook handling: NetBIOS names from registration packets are passed to a shell without proper validation or escaping. Unsanitized NetBIOS name data from WINS registration packets are inserted into a shell command and executed by the Samba Active Directory Domain Controllers wins hook, allowing an unauthenticated network attacker to achieve remote command execution as the Samba process.	Samba
CVE-2025-9640	Oct 15, 2025	Samba vfs_streams_xattr Heap LE Leading to ID Disclosure A flaw was found in Samba, in the vfs_streams_xattr module, where uninitialized heap memory could be written into alternate data streams. This allows an authenticated user to read residual memory content that may include sensitive data, resulting in an information disclosure vulnerability.	Samba
CVE-2025-0620	Jun 06, 2025	Samba smbd Group Membership Flaw Exposes Shares A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.	Samba
CVE-2024-12084	Jan 15, 2025	rsync Daemon Heap Bof via Checksum Length Overrun A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.	Rsync
CVE-2024-12088	Jan 14, 2025	Rsync --safe-links Path Traversal, Arbitrary File Write A flaw was found in rsync. When using the `--safe-links` option, the rsync client fails to properly verify if a symbolic link destination sent from the server contains another symbolic link within it. This results in a path traversal vulnerability, which may lead to arbitrary file write outside the desired directory.	Rsync
CVE-2024-12087	Jan 14, 2025	Path traversal in rsync via --inc-recursive option A path traversal vulnerability exists in rsync. It stems from behavior enabled by the `--inc-recursive` option, a default-enabled option for many client options and can be enabled by the server even if not explicitly enabled by the client. When using the `--inc-recursive` option, a lack of proper symlink verification coupled with deduplication checks occurring on a per-file-list basis could allow a server to write files outside of the client's intended destination directory. A malicious server could write malicious files to arbitrary locations named after valid directories/paths on the client.	Rsync
CVE-2024-12086	Jan 14, 2025	Rsync Server Remote File Enumeration via Checksum Exploit A flaw was found in rsync. It could allow a server to enumerate the contents of an arbitrary file from the client's machine. This issue occurs when files are being copied from a client to a server. During this process, the rsync server will send checksums of local data to the client to compare with in order to determine what data needs to be sent to the server. By sending specially constructed checksum values for arbitrary files, an attacker may be able to reconstruct the data of those files byte-by-byte based on the responses from the client.	Rsync
CVE-2024-12085	Jan 14, 2025	Rsync: Checksum Length Manipulation Enables Stack Data Leak A flaw was found in rsync which could be triggered when rsync compares file checksums. This flaw allows an attacker to manipulate the checksum length (s2length) to cause a comparison between a checksum and uninitialized memory and leak one byte of uninitialized stack data at a time.	Rsync
CVE-2020-25720	Nov 17, 2024	Samba Active Directory Object Creation Privilege Escalation Vulnerability A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.	Samba
CVE-2023-46768	Nov 08, 2023	Samba idmap Multi-threading Race Causing Feature Abuse Multi-thread vulnerability in the idmap module. Successful exploitation of this vulnerability may cause features to perform abnormally.	Samba
CVE-2023-4154	Nov 07, 2023	Samba DirSync Control Exposes AD Secrets to RODC and Privileged Users A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.	Samba
CVE-2023-42669	Nov 06, 2023	Samba rpcecho RPC DoS via dcesrv_echo_TestSleep() A vulnerability was found in Samba's "rpcecho" development server, a non-Windows RPC server used to test Samba's DCE/RPC stack elements. This vulnerability stems from an RPC function that can be blocked indefinitely. The issue arises because the "rpcecho" service operates with only one worker in the main RPC task, allowing calls to the "rpcecho" server to be blocked for a specified time, causing service disruptions. This disruption is triggered by a "sleep()" call in the "dcesrv_echo_TestSleep()" function under specific conditions. Authenticated users or attackers can exploit this vulnerability to make calls to the "rpcecho" server, requesting it to block for a specified duration, effectively disrupting most services and leading to a complete denial of service on the AD DC. The DoS affects all other services as "rpcecho" runs in the main RPC task.	Samba
CVE-2023-3961	Nov 03, 2023	Samba Pipe Name Path Traversal Potential Priv Escalation A path traversal vulnerability was identified in Samba when processing client pipe names connecting to Unix domain sockets within a private directory. Samba typically uses this mechanism to connect SMB clients to remote procedure call (RPC) services like SAMR LSA or SPOOLSS, which Samba initiates on demand. However, due to inadequate sanitization of incoming client pipe names, allowing a client to send a pipe name containing Unix directory traversal characters (../). This could result in SMB clients connecting as root to Unix domain sockets outside the private directory. If an attacker or client managed to send a pipe name resolving to an external service using an existing Unix domain socket, it could potentially lead to unauthorized access to the service and consequential adverse events, including compromise or service crashes.	Samba
CVE-2023-4091	Nov 03, 2023	Samba SMB Truncation via acl_xattr despite Read-Only A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.	Samba
CVE-2023-42670	Nov 03, 2023	Samba RPC Listener Abuse Enables AD DC Disruption A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation "classic DCs") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as "The procedure number is out of range" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services.	Samba
CVE-2023-5568	Oct 25, 2023	Samba Auth Heap Overflow DoS A heap-based Buffer Overflow flaw was discovered in Samba. It could allow a remote, authenticated attacker to exploit this vulnerability to cause a denial of service.	Samba
CVE-2022-2127	Jul 20, 2023	An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in winbindd_pam_auth_crap.c An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can trigger an out-of-bounds read in Winbind, possibly resulting in a crash.	Samba
CVE-2023-34966	Jul 20, 2023	An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.	Samba
CVE-2023-3347	Jul 20, 2023	A vulnerability was found in Samba's SMB2 packet signing mechanism A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured "server signing = required" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.	Samba
CVE-2023-34968	Jul 20, 2023	A path disclosure vulnerability was found in Samba A path disclosure vulnerability was found in Samba. As part of the Spotlight protocol, Samba discloses the server-side absolute path of shares, files, and directories in the results for search queries. This flaw allows a malicious client or an attacker with a targeted RPC request to view the information that is part of the disclosed path.	Samba
CVE-2023-34967	Jul 20, 2023	A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves.	Samba
CVE-2023-0922	Apr 03, 2023	The Samba AD DC administration tool The Samba AD DC administration tool, when operating against a remote LDAP server, will by default send new or reset passwords over a signed-only connection.	Samba
CVE-2023-0225	Apr 03, 2023	A flaw was found in Samba A flaw was found in Samba. An incomplete access check on dnsHostName allows authenticated but otherwise unprivileged users to delete this attribute from any object in the directory.	Samba
CVE-2023-0614	Apr 03, 2023	The fix in 4.6.16, 4.7.9, 4.8.4 and 4.9.7 for CVE-2018-10919 Confidential attribute disclosure vi LDAP filters was insufficient and an attacker may be able to obtain confidential BitLocker recovery keys The fix in 4.6.16, 4.7.9, 4.8.4 and 4.9.7 for CVE-2018-10919 Confidential attribute disclosure vi LDAP filters was insufficient and an attacker may be able to obtain confidential BitLocker recovery keys from a Samba AD DC.	Samba
CVE-2021-20251	Mar 06, 2023	A flaw was found in samba A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.	Samba
CVE-2022-45141	Mar 06, 2023	Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will issue rc4-hmac encrypted tickets despite the target server supporting better encryption (eg aes256-cts-hmac-sha1-96).	Samba
CVE-2018-14628	Jan 17, 2023	An information leak vulnerability was discovered in Samba's LDAP server An information leak vulnerability was discovered in Samba's LDAP server. Due to missing access control checks, an authenticated but unprivileged attacker could discover the names and preserved attributes of deleted objects in the LDAP store.	Samba
CVE-2022-3592	Jan 12, 2023	A symlink following vulnerability was found in Samba, where a user can create a symbolic link A symlink following vulnerability was found in Samba, where a user can create a symbolic link that will make 'smbd' escape the configured share path. This flaw allows a remote user with access to the exported part of the file system under a share via SMB1 unix extensions or NFS to create symlinks to files outside the 'smbd' configured share path and gain access to another restricted server's filesystem.	Samba
CVE-2022-3437	Jan 12, 2023	A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.	Samba
CVE-2022-42898	Dec 25, 2022	PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow) PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."	Samba
CVE-2022-44640	Dec 25, 2022	Heimdal before 7.7.1 Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC).	Samba
CVE-2022-4603	Dec 18, 2022	A vulnerability classified as problematic has been found in ppp A vulnerability classified as problematic has been found in ppp. Affected is the function dumpppp of the file pppdump/pppdump.c of the component pppdump. The manipulation of the argument spkt.buf/rpkt.buf leads to improper validation of array index. The real existence of this vulnerability is still doubted at the moment. The name of the patch is a75fb7b198eed50d769c80c36629f38346882cbf. It is recommended to apply a patch to fix this issue. VDB-216198 is the identifier assigned to this vulnerability. NOTE: pppdump is not used in normal process of setting up a PPP connection, is not installed setuid-root, and is not invoked automatically in any scenario.	Ppp
CVE-2022-37966	Nov 09, 2022	Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability	Samba
CVE-2022-37967	Nov 09, 2022	Windows Kerberos Elevation of Privilege Vulnerability Windows Kerberos Elevation of Privilege Vulnerability	Samba
CVE-2022-38023	Nov 09, 2022	Netlogon RPC Elevation of Privilege Vulnerability Netlogon RPC Elevation of Privilege Vulnerability	Samba
CVE-2022-1615	Sep 01, 2022	In Samba, GnuTLS gnutls_rnd() In Samba, GnuTLS gnutls_rnd() can fail and give predictable random values.	Samba
CVE-2022-32743	Sep 01, 2022	Samba does not validate the Validated-DNS-Host-Name right for the dNSHostName attribute Samba does not validate the Validated-DNS-Host-Name right for the dNSHostName attribute which could permit unprivileged users to write it.	Samba
CVE-2022-0336	Aug 29, 2022	The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.	Samba
CVE-2022-2031	Aug 25, 2022	A flaw was found in Samba A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.	Samba
CVE-2022-32742	Aug 25, 2022	A flaw was found in Samba A flaw was found in Samba. Some SMB1 write requests were not correctly range-checked to ensure the client had sent enough data to fulfill the write, allowing server memory contents to be written into the file (or printer) instead of client-supplied data. The client cannot control the area of the server memory written to the file (or printer).	Samba
CVE-2022-32744	Aug 25, 2022	A flaw was found in Samba A flaw was found in Samba. The KDC accepts kpasswd requests encrypted with any key known to it. By encrypting forged kpasswd requests with its own key, a user can change other users' passwords, enabling full domain takeover.	Samba
CVE-2022-32746	Aug 25, 2022	A flaw was found in the Samba AD LDAP server A flaw was found in the Samba AD LDAP server. The AD DC database audit logging module can access LDAP message values freed by a preceding database module, resulting in a use-after-free issue. This issue is only possible when modifying certain privileged attributes, such as userAccountControl.	Samba
CVE-2022-32745	Aug 25, 2022	A flaw was found in Samba A flaw was found in Samba. Samba AD users can cause the server to access uninitialized data with an LDAP add or modify the request, usually resulting in a segmentation fault.	Samba
CVE-2021-20316	Aug 23, 2022	A flaw was found in the way Samba handled file/directory metadata A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.	Samba
CVE-2021-3670	Aug 23, 2022	MaxQueryDuration not honoured in Samba AD DC LDAP MaxQueryDuration not honoured in Samba AD DC LDAP	Samba
CVE-2022-29154	Aug 02, 2022	An issue was discovered in rsync before 3.2.5 An issue was discovered in rsync before 3.2.5 that allows malicious remote servers to write arbitrary files inside the directories of connecting peers. The server chooses which files/directories are sent to the client. However, the rsync client performs insufficient validation of file names. A malicious rsync server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the rsync client target directory and subdirectories (for example, overwrite the .ssh/authorized_keys file).	Rsync
CVE-2022-29869	Apr 28, 2022	cifs-utils through 6.14, with verbose logging cifs-utils through 6.14, with verbose logging, can cause an information leak when a file contains = (equal sign) characters but is not a valid credentials file.	Cifs Utils
CVE-2022-27239	Apr 27, 2022	In cifs-utils through 6.14 In cifs-utils through 6.14, a stack-based buffer overflow when parsing the mount.cifs ip= command-line argument could lead to local attackers gaining root privileges.	Cifs Utils
CVE-2020-25721	Mar 16, 2022	Kerberos acceptors need easy access to stable AD identifiers (eg objectSid) Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.	Samba
CVE-2021-23192	Mar 02, 2022	A flaw was found in the way samba implemented DCE/RPC A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.	Samba