CVE-2023-53008: cifs: fix potential memory leaks in session setup

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-27 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix potential memory leaks in session setup Make sure to free cifs_ses::auth_key.response before allocating it as we might end up leaking memory in reconnect or mounting.

Affected products

Linux kernel: before 6.1.9; 6.2-rc1, 6.2-rc2, 6.2-rc3 — fixed in 6.1.9

How to fix

Upgrade to a fixed version: Linux kernel 6.1.9. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2fe58d977ee05da5bb89ef5dc4f5bf2dc15db46f
https://git.kernel.org/stable/c/893d45394dbe4b5cbf3723c19e2ccc8b93a6ac9b

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