Summary
Linux Kernel contains a race condition vulnerability which allows concurrent writes to the same AF_ALG socket causing data to be unpredictably interleaved and creating inconsistencies in the socket's internal state.
Remediation
CISA required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
- Advisoryhttps://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
- Advisoryhttps://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9
- Advisoryhttps://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
- Advisoryhttps://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84
- Advisoryhttps://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d
- Advisoryhttps://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042
- Advisoryhttps://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285
- Advisoryhttps://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- Advisoryhttps://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- Advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-39964
- Referencehttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964
- Referencehttps://cert-portal.siemens.com/productcert/html/ssa-019113.html