CVE-2025-38079: debian linux Double Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_hash - fix double free in hash_accept If accept(2) is called on socket type algif_hash with MSG_MORE flag set and crypto_ahash_import fails, sk2 is freed. However, it is also freed in af_alg_release, leading to slab-use-after-free error.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-415 CWE-415

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.38 — 5.4.294
linux	linux_kernel	5.5 — 5.10.238
linux	linux_kernel	5.11 — 5.15.185
linux	linux_kernel	5.16 — 6.1.141
linux	linux_kernel	6.2 — 6.6.93
linux	linux_kernel	6.7 — 6.12.31
linux	linux_kernel	6.13 — 6.14.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0346f4b742345d1c733c977f3a7aef5a6419a967 https://git.kernel.org/stable/c/134daaba93193df9e988524b5cd2f52d15eb1993 https://git.kernel.org/stable/c/2f45a8d64fb4ed4830a4b3273834ecd6ca504896 https://git.kernel.org/stable/c/5bff312b59b3f2a54ff504e4f4e47272b64f3633 https://git.kernel.org/stable/c/b2df03ed4052e97126267e8c13ad4204ea6ba9b6 https://git.kernel.org/stable/c/bf7bba75b91539e93615f560893a599c1e1c98bf https://git.kernel.org/stable/c/c3059d58f79fdfb2201249c2741514e34562b547 https://git.kernel.org/stable/c/f0f3d09f53534ea385d55ced408f2b67059b16e4

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html https://cert-portal.siemens.com/productcert/html/ssa-082556.html

Frequently Asked Questions

What is CVE-2025-38079? +

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_hash - fix double free in hash_accept If accept(2) is called on socket type algif_hash with MSG_MORE flag set and crypto_ahash_import fails, sk2 is freed. However, it is also freed in af_alg_release, leading to slab-use-after-free error. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38079? +

CVE-2025-38079 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-38079? +

CVE-2025-38079 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-38079? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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