OpenBSD LibreSSL Crypto Library
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By the Year
In 2025 there have been 0 vulnerabilities in OpenBSD LibreSSL. LibreSSL did not have any published security vulnerabilities last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2025 | 0 | 0.00 |
| 2024 | 0 | 0.00 |
| 2023 | 3 | 8.30 |
| 2022 | 0 | 0.00 |
| 2021 | 1 | 5.50 |
| 2020 | 0 | 0.00 |
| 2019 | 0 | 0.00 |
| 2018 | 2 | 6.05 |
It may take a day or so for new LibreSSL vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.
Recent OpenBSD LibreSSL Security Vulnerabilities
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004
CVE-2023-35784
9.8 - Critical
- June 16, 2023
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3. NOTE: OpenSSL is not affected.
Double-free
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006
CVE-2021-46880
9.8 - Critical
- April 15, 2023
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.
Improper Certificate Validation
An issue was discovered in x509/x509_verify.c in LibreSSL before 3.6.1, and in OpenBSD before 7.2 errata 001
CVE-2022-48437
5.3 - Medium
- April 12, 2023
An issue was discovered in x509/x509_verify.c in LibreSSL before 3.6.1, and in OpenBSD before 7.2 errata 001. x509_verify_ctx_add_chain does not store errors that occur during leaf certificate verification, and therefore an incorrect error is returned. This behavior occurs when there is an installed verification callback that instructs the verifier to continue upon detecting an invalid certificate.
Improper Certificate Validation
x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read
CVE-2021-41581
5.5 - Medium
- September 24, 2021
x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read. When the input exceeds DOMAIN_PART_MAX_LEN, the buffer lacks '\0' termination.
Out-of-bounds Read
LibreSSL before 2.6.5 and 2.7.x before 2.7.4
CVE-2018-12434
4.7 - Medium
- June 15, 2018
LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
Information Disclosure
The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently
CVE-2018-8970
7.4 - High
- March 24, 2018
The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.
Improper Certificate Validation
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