CVE-2024-42306: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: udf: Avoid using corrupted block bitmap buffer When the filesystem block bitmap is corrupted, we detect the corruption while loading the bitmap and fail the allocation with error. However the next allocation from the same bitmap will notice the bitmap buffer is already loaded and tries to allocate from the bitmap with mixed results (depending on the exact nature of the bitmap corruption). Fix the problem by using BH_verified bit to indicate whether the bitmap is valid or not.

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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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.14.326 — 4.15
linux	linux_kernel	4.19.295 — 4.20
linux	linux_kernel	5.4.257 — 5.4.282
linux	linux_kernel	5.10.195 — 5.10.224
linux	linux_kernel	5.15.132 — 5.15.165
linux	linux_kernel	6.1.53 — 6.1.103
linux	linux_kernel	6.3 — 6.6.44
linux	linux_kernel	6.7 — 6.10.3

References

Advisories & Patches

https://git.kernel.org/stable/c/2199e157a465aaf98294d3932797ecd7fce942d5 https://git.kernel.org/stable/c/271cab2ca00652bc984e269cf1208699a1e09cdd https://git.kernel.org/stable/c/57053b3bcf3403b80db6f65aba284d7dfe7326af https://git.kernel.org/stable/c/6a43e3c210df6c5f00570f4be49a897677dbcb64 https://git.kernel.org/stable/c/8ca170c39eca7cad6e0cfeb24e351d8f8eddcd65 https://git.kernel.org/stable/c/a90d4471146de21745980cba51ce88e7926bcc4f https://git.kernel.org/stable/c/cae9e59cc41683408b70b9ab569f8654866ba914

Other References

https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Frequently Asked Questions

What is CVE-2024-42306? +

In the Linux kernel, the following vulnerability has been resolved: udf: Avoid using corrupted block bitmap buffer When the filesystem block bitmap is corrupted, we detect the corruption while loading the bitmap and fail the allocation with error. However the next allocation from the same bitmap will notice the bitmap buffer is already loaded and tries to allocate from the bitmap with mixed results (depending on the exact nature of the bitmap corruption). Fix the problem by using BH_verified bit to indicate whether the bitmap is valid or not. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-42306? +

CVE-2024-42306 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-2024-42306? +

CVE-2024-42306 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-2024-42306? +

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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CVE-2024-42306