MSRXCVE-2025-39964
CVE-2025-39964
Linux Kernel Race Condition Vulnerability
Apply 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.
CVSS 3.1 · CNA
chance of exploitation in the next 30 days (EPSS; higher than 75% of CVEs)
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.
Scores
Affected packages and fixed versions
| Package | Ecosystem | Fixed in |
|---|---|---|
| Kernel | Linux | 5.10.245, 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9 |
Affected products
- linux linux kernel: ≥ 2.6.38, < 5.10.245; ≥ 5.11, < 5.15.194; ≥ 5.16, < 6.1.154; ≥ 6.2, < 6.6.108; ≥ 6.7, < 6.12.49; ≥ 6.13, < 6.16.9; 6.17 rc1; 6.17 rc2; 6.17 rc3; 6.17 rc4; 6.17 rc5; 6.17 rc6
- siemens simatic s7-1500 cpu 1518-4 pn\/dp mfp firmware: ≥ 3.1.6
- siemens simatic s7-1500 cpu 1518f-4 pn\/dp mfp firmware: ≥ 3.1.6
Weakness: CWE-362
10 references (advisories, patches, write-ups)
- https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce · Patch
- https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285 · Patch
- https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8 · Patch
- https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042 · Patch
- https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84 · Patch
- https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d · Patch
- https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9 · Patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html · Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964 · US Government Resource
Sources: NVD, CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.