CVE-2025-68160

Publication date 27 January 2026

Last updated 28 January 2026

Ubuntu priority

Low

Why this priority?

Description

Issue summary: Writing large, newline-free data into a BIO chain using the line-buffering filter where the next BIO performs short writes can trigger a heap-based out-of-bounds write. Impact summary: This out-of-bounds write can cause memory corruption which typically results in a crash, leading to Denial of Service for an application. The line-buffering BIO filter (BIO_f_linebuffer) is not used by default in TLS/SSL data paths. In OpenSSL command-line applications, it is typically only pushed onto stdout/stderr on VMS systems. Third-party applications that explicitly use this filter with a BIO chain that can short-write and that write large, newline-free data influenced by an attacker would be affected. However, the circumstances where this could happen are unlikely to be under attacker control, and BIO_f_linebuffer is unlikely to be handling non-curated data controlled by an attacker. For that reason the issue was assessed as Low severity. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the BIO implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

Read the notes from the security team

Why is this CVE low priority?

OpenSSL developers have rated this issue to be low severity

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
openssl 25.10 questing
Fixed 3.5.3-1ubuntu3
25.04 plucky Ignored end of life, was needed
24.04 LTS noble
Fixed 3.0.13-0ubuntu3.7
22.04 LTS jammy
Fixed 3.0.2-0ubuntu1.21
20.04 LTS focal
Fixed 1.1.1f-1ubuntu2.24+esm2
18.04 LTS bionic
Fixed 1.1.1-1ubuntu2.1~18.04.23+esm7
16.04 LTS xenial
Fixed 1.0.2g-1ubuntu4.20+esm14
14.04 LTS trusty
Fixed 1.0.1f-1ubuntu2.27+esm12
openssl1.0 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed 1.0.2n-1ubuntu5.13+esm3
nodejs 25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Not affected
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Not affected
edk2 25.10 questing
Needs evaluation
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation

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Notes

mdeslaur

edk2 in jammy embeds OpenSSL 1.1.1j edk2 in noble embeds OpenSSL 3.0.9 edk2 in plucky embeds OpenSSL 3.4.0 edk2 in questing embeds OpenSSL 3.4.0 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable

References

Related Ubuntu Security Notices (USN)

    • USN-7980-1
    • OpenSSL vulnerabilities
    • 27 January 2026
    • USN-7980-2
    • OpenSSL vulnerabilities
    • 27 January 2026

Other references