CVE-2025-37792: debian linux Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: Prevent potential NULL dereference The btrtl_initialize() function checks that rtl_load_file() either had an error or it loaded a zero length file. However, if it loaded a zero length file then the error code is not set correctly. It results in an error pointer vs NULL bug, followed by a NULL pointer dereference. This was detected by Smatch: drivers/bluetooth/btrtl.c:592 btrtl_initialize() warn: passing zero to 'ERR_PTR'

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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-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.19 — 5.4.293
linux	linux_kernel	5.5 — 5.10.237
linux	linux_kernel	5.11 — 5.15.181
linux	linux_kernel	5.16 — 6.1.135
linux	linux_kernel	6.2 — 6.6.88
linux	linux_kernel	6.7 — 6.12.25
linux	linux_kernel	6.13 — 6.14.4
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/2d7c60c2a38b4b461fa960ad0995136a6bfe0756 https://git.kernel.org/stable/c/324dddea321078a6eeb535c2bff5257be74c9799 https://git.kernel.org/stable/c/3db6605043b50c8bb768547b23e0222f67ceef3e https://git.kernel.org/stable/c/53ceef799dcfc22c734d600811bfc9dd32eaea0a https://git.kernel.org/stable/c/73dc99c0ea94abd22379b2d82cacbc73f3e18ec1 https://git.kernel.org/stable/c/aaf356f872a60db1e96fb762a62c4607fd22741f https://git.kernel.org/stable/c/c3e9717276affe59fd8213706db021b493e81e34 https://git.kernel.org/stable/c/d8441818690d795232331bd8358545c5c95b6b72

Other References

https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Frequently Asked Questions

What is CVE-2025-37792? +

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: Prevent potential NULL dereference The btrtl_initialize() function checks that rtl_load_file() either had an error or it loaded a zero length file. However, if it loaded a zero length file then the error code is not set correctly. It results in an error pointer vs NULL bug, followed by a NULL pointer dereference. This was detected by Smatch: drivers/bluetooth/btrtl.c:592 btrtl_initialize() warn: passing zero to 'ERR_PTR' It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37792? +

CVE-2025-37792 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-2025-37792? +

CVE-2025-37792 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-2025-37792? +

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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