Linux · Kernel
CVE-2025-39964
crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
概要
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.
CISA: 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.
対処法
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.
米国連邦機関の対応期限：2026年9月21日
- CISAのリストに追加
- 2026年9月18日
- 公開日
- 2025年10月13日
- 深刻度
- 高 7.8 CVSS 3.1
- 今後30日間に攻撃される可能性（EPSS）
- 1.6% 既知の全脆弱性の上位23.8%
- 脆弱性の種類
- CWE-362
- 詳細
- NVD · CVE.org · CISA
すべての参照（7件）
- https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
- https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9
- https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
- https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84
- https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d
- https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042
- https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285
Linuxのその他の悪用された脆弱性
| 追加日 | 脆弱性 | 製品 | 深刻度 | 攻撃の可能性 |
|---|---|---|---|---|
| 2026/10/28 | Missing Initialization of a Variable | Kernel | 高 7.8 | 16% |
| 2026/09/18 | Improper Check for Unusual or Exceptional Conditions | Kernel | 緊急 9.8 | 3.3% |
| 2026/09/18 | Out-of-Bounds Write | Kernel | 高 8.8 | 0.9% |
| 2026/08/27 | Unspecified | Kernel | 高 7.8 | 0.7% |
| 2026/08/26 | Out-of-Bounds Write | Kernel | 高 7.8 | 8.9% |
| 2026/06/02 | Improper Authentication | Kernel | 高 7.8 | 5.5% |
| 2026/05/01 | Incorrect Resource Transfer Between Spheres | Kernel | 高 7.8 | 98% |
| 2026/01/26 | Integer Overflow | Kernel | 高 7.8 | 15% |
出典：Known Exploited Vulnerabilities（CISA、パブリックドメイン）、CVE records（cve.org）、EPSS（FIRST）。攻撃の可能性は、今後30日以内に誰かがその脆弱性の悪用を試みるというEPSSの推定値です。