CVE-2025-37962: debian linux — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix memory leak in parse_lease_state() The previous patch that added bounds check for create lease context introduced a memory leak. When the bounds check fails, the function returns NULL without freeing the previously allocated lease_ctx_info structure. This patch fixes the issue by adding kfree(lreq) before returning NULL in both boundary check cases.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.134 — 6.1.139
linux	linux_kernel	6.6.87 — 6.6.91
linux	linux_kernel	6.12.23 — 6.12.29
linux	linux_kernel	6.13.11 — 6.14
linux	linux_kernel	6.14.2 — 6.14.7
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/2148d34371b06dac696c0497a98a6bf905a51650 https://git.kernel.org/stable/c/829e19ef741d9e9932abdc3bee5466195e0852cf https://git.kernel.org/stable/c/af9e2d4732a548db8f6f5a90c2c20a789a3d7240 https://git.kernel.org/stable/c/eb4447bcce915b43b691123118893fca4f372a8f https://git.kernel.org/stable/c/facf22c1a394c1e023dab5daf9a494f722771e1c

Other References

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Frequently Asked Questions

What is CVE-2025-37962? +

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix memory leak in parse_lease_state() The previous patch that added bounds check for create lease context introduced a memory leak. When the bounds check fails, the function returns NULL without freeing the previously allocated lease_ctx_info structure. This patch fixes the issue by adding kfree(lreq) before returning NULL in both boundary check cases. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37962? +

CVE-2025-37962 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37962? +

CVE-2025-37962 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-2025-37962? +

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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