Busybox

BusyBox Tar Extraction Hardlink/Symlink Escalation Vulnerability
CVE-2026-26158 7 - High - February 11, 2026

A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.

External Control of File Name or Path

BusyBox: Archive Utils Path Traversal Enables Arbitrary File Overwrite
CVE-2026-26157 7 - High - February 11, 2026

A flaw was found in BusyBox. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when extracted, and under specific conditions, may write to files outside the intended directory. This can lead to arbitrary file overwrite, potentially enabling code execution through the modification of sensitive system files.

External Control of File Name or Path

BusyBox wget <=1.3.7 CRLF injection in HTTP request-target
CVE-2025-60876 6.5 - Medium - November 10, 2025

BusyBox wget thru 1.3.7 accepted raw CR (0x0D)/LF (0x0A) and other C0 control bytes in the HTTP request-target (path/query), allowing the request line to be split and attacker-controlled headers to be injected. To preserve the HTTP/1.1 request-line shape METHOD SP request-target SP HTTP/1.1, a raw space (0x20) in the request-target must also be rejected (clients should use %20).

Authorization

BusyBox 1.31.1 CVE-2025-12221: Multi-Vuls in BLU-IC2/IC4 (1.19.5)
CVE-2025-12221 - October 25, 2025

Busybox 1.31.1 - Multiple Known Vulnerabilities.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.

Configuration

Busybox 1.31.1 Multiple Vulnerabilities in BLU-IC2/BLU-IC4
CVE-2025-12220 - October 25, 2025

Busybox 1.31.1 - Multiple Known Vulnerabilities.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.

1395

BusyBox netstat argv[0] ANSI escape DoS <=1.37.0
CVE-2024-58251 - April 23, 2025

In netstat in BusyBox through 1.37.0, local users can launch of network application with an argv[0] containing an ANSI terminal escape sequence, leading to a denial of service (terminal locked up) when netstat is used by a victim.

BusyBox tar hidden filenames via escape seq before 1.37.0
CVE-2025-46394 3.2 - Low - April 23, 2025

In tar in BusyBox through 1.37.0, a TAR archive can have filenames hidden from a listing through the use of terminal escape sequences.

User Interface (UI) Misrepresentation of Critical Information

Use-after-Free in BusyBox 1.36.1 awk.c via crafted awk pattern
CVE-2023-42365 - November 27, 2023

A use-after-free vulnerability was discovered in BusyBox v.1.36.1 via a crafted awk pattern in the awk.c copyvar function.

BusyBox v1.36.1 Heap-Buffer-Overflow in awk.c::next_token (CVE-2023-42366)
CVE-2023-42366 5.5 - Medium - November 27, 2023

A heap-buffer-overflow was discovered in BusyBox v.1.36.1 in the next_token function at awk.c:1159.

Memory Corruption

Use-After-Free in BusyBox v1.36.1 Awk.c Leads to DoS
CVE-2023-42364 5.5 - Medium - November 27, 2023

A use-after-free vulnerability in BusyBox v.1.36.1 allows attackers to cause a denial of service via a crafted awk pattern in the awk.c evaluate function.

Dangling pointer

BusyBox 1.36.1 Use-After-Free in xasprintf
CVE-2023-42363 5.5 - Medium - November 27, 2023

A use-after-free vulnerability was discovered in xasprintf function in xfuncs_printf.c:344 in BusyBox v.1.36.1.

Dangling pointer

Directory Traversal in BusyBox v1.33.2 CPIO Command
CVE-2023-39810 - August 28, 2023

An issue in the CPIO command of Busybox v1.33.2 allows attackers to execute a directory traversal.

BusyBox <1.35 Stack Overflow in ash.c (CVE-2022-48174)
CVE-2022-48174 - August 22, 2023

There is a stack overflow vulnerability in ash.c:6030 in busybox before 1.35. In the environment of Internet of Vehicles, this vulnerability can be executed from command to arbitrary code execution.

A use-after-free in Busybox 1.35-x's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the copyvar function.
CVE-2022-30065 7.8 - High - May 18, 2022

A use-after-free in Busybox 1.35-x's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the copyvar function.

Dangling pointer

BusyBox through 1.35.0
CVE-2022-28391 8.8 - High - April 03, 2022

BusyBox through 1.35.0 allows remote attackers to execute arbitrary code if netstat is used to print a DNS PTR record's value to a VT compatible terminal. Alternatively, the attacker could choose to change the terminal's colors.

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function
CVE-2021-42378 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function

Dangling pointer

A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given
CVE-2021-42373 5.5 - Medium - November 15, 2021

A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given

NULL Pointer Dereference

An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed
CVE-2021-42374 5.3 - Medium - November 15, 2021

An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that

Out-of-bounds Read

An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command
CVE-2021-42375 5.5 - Medium - November 15, 2021

An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due to the shell mistaking specific characters for reserved characters. This may be used for DoS under rare conditions of filtered command input.

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command
CVE-2021-42376 5.5 - Medium - November 15, 2021

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.

NULL Pointer Dereference

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command
CVE-2021-42377 9.8 - Critical - November 15, 2021

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.

Release of Invalid Pointer or Reference

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the next_input_file function
CVE-2021-42379 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the next_input_file function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function
CVE-2021-42386 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function
CVE-2021-42385 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function
CVE-2021-42384 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function
CVE-2021-42383 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_s function
CVE-2021-42382 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_s function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function
CVE-2021-42381 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function

Dangling pointer

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function
CVE-2021-42380 7.2 - High - November 15, 2021

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function

Dangling pointer

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault
CVE-2021-28831 7.5 - High - March 19, 2021

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

Improper Handling of Exceptional Conditions

An issue was discovered in BusyBox before 1.30.0
CVE-2018-20679 7.5 - High - January 09, 2019

An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.

Out-of-bounds Read

An issue was discovered in BusyBox through 1.30.0
CVE-2019-5747 7.5 - High - January 09, 2019

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.

Out-of-bounds Read

huft_build in archival/libarchive/decompress_gunzip.c in BusyBox before 1.27.2 misuses a pointer
CVE-2015-9261 - July 26, 2018

huft_build in archival/libarchive/decompress_gunzip.c in BusyBox before 1.27.2 misuses a pointer, causing segfaults and an application crash during an unzip operation on a specially crafted ZIP file.

BusyBox project BusyBox wget version prior to commit 8e2174e9bd836e53c8b9c6e00d1bc6e2a718686e contains a Buffer Overflow vulnerability in Busybox wget
CVE-2018-1000517 9.8 - Critical - June 26, 2018

BusyBox project BusyBox wget version prior to commit 8e2174e9bd836e53c8b9c6e00d1bc6e2a718686e contains a Buffer Overflow vulnerability in Busybox wget that can result in heap buffer overflow. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in after commit 8e2174e9bd836e53c8b9c6e00d1bc6e2a718686e.

Classic Buffer Overflow

Busybox contains a Missing SSL certificate validation vulnerability in The "busybox wget" applet
CVE-2018-1000500 8.1 - High - June 26, 2018

Busybox contains a Missing SSL certificate validation vulnerability in The "busybox wget" applet that can result in arbitrary code execution. This attack appear to be exploitable via Simply download any file over HTTPS using "busybox wget https://compromised-domain.com/important-file".

Improper Certificate Validation

In the add_match function in libbb/lineedit.c in BusyBox through 1.27.2
CVE-2017-16544 8.8 - High - November 20, 2017

In the add_match function in libbb/lineedit.c in BusyBox through 1.27.2, the tab autocomplete feature of the shell, used to get a list of filenames in a directory, does not sanitize filenames and results in executing any escape sequence in the terminal. This could potentially result in code execution, arbitrary file writes, or other attacks.

Code Injection

The get_next_block function in archival/libarchive/decompress_bunzip2.c in BusyBox 1.27.2 has an Integer Overflow
CVE-2017-15873 5.5 - Medium - October 24, 2017

The get_next_block function in archival/libarchive/decompress_bunzip2.c in BusyBox 1.27.2 has an Integer Overflow that may lead to a write access violation.

Integer Overflow or Wraparound

Directory traversal vulnerability in the BusyBox implementation of tar before 1.22.0 v5
CVE-2011-5325 7.5 - High - August 07, 2017

Directory traversal vulnerability in the BusyBox implementation of tar before 1.22.0 v5 allows remote attackers to point to files outside the current working directory via a symlink.

Directory traversal

Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0
CVE-2016-2148 9.8 - Critical - February 09, 2017

Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to have unspecified impact via vectors involving OPTION_6RD parsing.

Buffer Overflow

Integer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0
CVE-2016-2147 7.5 - High - February 09, 2017

Integer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to cause a denial of service (crash) via a malformed RFC1035-encoded domain name, which triggers an out-of-bounds heap write.

Integer Overflow or Wraparound

The recv_and_process_client_pkt function in networking/ntpd.c in busybox
CVE-2016-6301 7.5 - High - December 09, 2016

The recv_and_process_client_pkt function in networking/ntpd.c in busybox allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged NTP packet, which triggers a communication loop.

Infinite Loop

util-linux/mdev.c in BusyBox before 1.21.0 uses 0777 permissions for parent directories when creating nested directories under /dev/, which
CVE-2013-1813 - November 23, 2013

util-linux/mdev.c in BusyBox before 1.21.0 uses 0777 permissions for parent directories when creating nested directories under /dev/, which allows local users to have unknown impact and attack vectors.

Permissions, Privileges, and Access Controls

The DHCP client (udhcpc) in BusyBox before 1.20.0
CVE-2011-2716 - July 03, 2012

The DHCP client (udhcpc) in BusyBox before 1.20.0 allows remote DHCP servers to execute arbitrary commands via shell metacharacters in the (1) HOST_NAME, (2) DOMAIN_NAME, (3) NIS_DOMAIN, and (4) TFTP_SERVER_NAME host name options.

BusyBox 1.1.1 does not use a salt when generating passwords, which makes it easier for local users to guess passwords
CVE-2006-1058 5.5 - Medium - April 04, 2006

BusyBox 1.1.1 does not use a salt when generating passwords, which makes it easier for local users to guess passwords from a stolen password file using techniques such as rainbow tables.

Use of Password Hash With Insufficient Computational Effort