What’s Vulnerable › Vulnerabilities

CVE-2024-35826: block: Fix page refcounts for unaligned buffers in __bio_release_pages()

• 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: 2024-05-17 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: block: Fix page refcounts for unaligned buffers in __bio_release_pages() Fix an incorrect number of pages being released for buffers that do not start at the beginning of a page.

Affected products

• Linux kernel: from 4.19.307 before 4.20; from 5.4.269 before 5.5; from 5.10.210 before 5.11; from 5.15.148 before 5.16; from 6.1.75 before 6.1.84; from 6.6.14 before 6.6.24 — fixed in 4.20, 5.11, 5.16, 5.5, 6.1.84, 6.6.24

How to fix

Upgrade to a fixed version: Linux kernel 4.20, 5.11, 5.16, 5.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/242006996d15f5ca62e22f8c7de077d9c4a8f367
• https://git.kernel.org/stable/c/38b43539d64b2fa020b3b9a752a986769f87f7a6
• https://git.kernel.org/stable/c/7d3765550374f71248c55e6206ea1d6fd4537e65
• https://git.kernel.org/stable/c/c9d3d2fbde9b8197bce88abcbe8ee8e713ffe7c2
• https://git.kernel.org/stable/c/ecbd9ced84dd655a8f4cd49d2aad0e80dbf6bf35
• https://git.kernel.org/stable/c/242006996d15f5ca62e22f8c7de077d9c4a8f367
• https://git.kernel.org/stable/c/38b43539d64b2fa020b3b9a752a986769f87f7a6
• https://git.kernel.org/stable/c/7d3765550374f71248c55e6206ea1d6fd4537e65
• https://git.kernel.org/stable/c/c9d3d2fbde9b8197bce88abcbe8ee8e713ffe7c2
• https://git.kernel.org/stable/c/ecbd9ced84dd655a8f4cd49d2aad0e80dbf6bf35

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