CVE-2024-40939: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: Fix tainted pointer delete is case of region creation fail In case of region creation fail in ipc_devlink_create_region(), previously created regions delete process starts from tainted pointer which actually holds error code value. Fix this bug by decreasing region index before delete. Found by Linux Verification Center (linuxtesting.org) with SVACE.

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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-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.16 — 6.1.95
linux	linux_kernel	6.2 — 6.6.35
linux	linux_kernel	6.7 — 6.9.6
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/040d9384870386eb5dc55472ac573ac7756b2050 https://git.kernel.org/stable/c/37a438704d19bdbe246d51d3749b6b3a8fe65afd https://git.kernel.org/stable/c/b0c9a26435413b81799047a7be53255640432547 https://git.kernel.org/stable/c/fe394d59cdae81389dbf995e87c83c1acd120597 https://git.kernel.org/stable/c/040d9384870386eb5dc55472ac573ac7756b2050 https://git.kernel.org/stable/c/37a438704d19bdbe246d51d3749b6b3a8fe65afd https://git.kernel.org/stable/c/b0c9a26435413b81799047a7be53255640432547 https://git.kernel.org/stable/c/fe394d59cdae81389dbf995e87c83c1acd120597

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-40939? +

In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: Fix tainted pointer delete is case of region creation fail In case of region creation fail in ipc_devlink_create_region(), previously created regions delete process starts from tainted pointer which actually holds error code value. Fix this bug by decreasing region index before delete. Found by Linux Verification Center (linuxtesting.org) with SVACE. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-40939? +

CVE-2024-40939 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-2024-40939? +

CVE-2024-40939 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-40939? +

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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