Exploitation active confirmée
Ajoutée au catalogue CISA KEV le 18/09/2026, correctif exigé avant le 21/09/2026 pour les agences fédérales américaines.
Action requise : 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.
Description officielle (NVD)
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.
Preuves de concept publiques (2)
Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.
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n1k0oowang/CVE-2025-39964_EXP
· ★ 3 · 13/11/2025
CVE-2025-39964 EXP
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suominen/CVE-2025-39964
· ★ 0 · 20/09/2026
Tracking CVE-2025-39964, the Linux kernel AF_ALG concurrent-write race
Références
- 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
En bref
| Éditeur | Linux |
| Produit | Kernel |
| Publiée le | 13/10/2025 |
| Modifiée le | 19/10/2026 |
| CVSS | 5.5 (v3.1) |
| EPSS | 1,36 % (centile 72) |
| CWE | CWE-362 |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.
Produits concernés
linux · linux_kernel
siemens · simatic_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware
siemens · simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp_firmware
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