CVE-2025-39964

Description

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.

CVSS breakdown

Affected products

• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – e4c1ec11132ec466f7362a95f36a506ce4dc08c9
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 7c4491b5644e3a3708f3dbd7591be0a570135b84
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 9aee87da5572b3a14075f501752e209801160d3d
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 45bcf60fe49b37daab1acee57b27211ad1574042
• Linux / Linux8ff590903d5fc7f5a0a988c38267a3d08e6393a2 – 1b34cbbf4f011a121ef7b2d7d6e6920a036d5285
• Linux / Linux2.6.38 – 2.6.38
• Linux / Linux0 – 2.6.38
• Linux / Linux5.10.245 – 5.10.*
• Linux / Linux5.15.194 – 5.15.*
• Linux / Linux6.1.154 – 6.1.*
• Linux / Linux6.6.108 – 6.6.*
• Linux / Linux6.12.49 – 6.12.*
• Linux / Linux6.16.9 – 6.16.*
• Linux / Linux6.17 – *
• Linux / Linux kernel2.6.38 – 5.10.245
• Linux / Linux kernel6.17 – 6.17
• Linux / Linux kernel6.17 – 6.17
• Linux / Linux kernel6.17 – 6.17
• Linux / Linux kernel6.17 – 6.17
• Linux / Linux kernel6.17 – 6.17
• Linux / Linux kernel6.17 – 6.17
• Siemens / simatic_s7-1500_cpu_1518-4_pn/dp_mfp_firmware3.1.6 –
• Siemens / simatic_s7-1500_cpu_1518f-4_pn/dp_mfp_firmware3.1.6 –

References

• MISChttps://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
• MISChttps://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9
• MISChttps://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
• MISChttps://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84
• MISChttps://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d
• MISChttps://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042
• MISChttps://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285