What’s Vulnerable › Vulnerabilities

CVE-2024-49877: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate When doing cleanup, if flags without OCFS2_BH_READAHEAD, it may trigger NULL pointer dereference in the following ocfs2_set_buffer_uptodate() if bh is NULL.

Affected products

• Linux kernel: from 4.20 before 5.10.227; from 5.11 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.55; from 6.7 before 6.10.14; from 6.11 before 6.11.3 — fixed in 5.10.227, 5.15.168, 6.1.113, 6.10.14, 6.11.3, 6.6.55

How to fix

Upgrade to a fixed version: Linux kernel 5.10.227, 5.15.168, 6.1.113, 6.10.14. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/01cb2e751cc61ade454c9bc1aaa2eac1f8197112
• https://git.kernel.org/stable/c/190d98bcd61117a78fe185222d162180f061a6ca
• https://git.kernel.org/stable/c/33b525cef4cff49e216e4133cc48452e11c0391e
• https://git.kernel.org/stable/c/46b1edf0536a5291a8ad2337f88c926214b209d9
• https://git.kernel.org/stable/c/4846e72ab5a0726e49ad4188b9d9df091ae78c64
• https://git.kernel.org/stable/c/61b84013e560382cbe7dd56758be3154d43a3988
• https://git.kernel.org/stable/c/d52c5652e7dcb7a0648bbb8642cc3e617070ab49
• https://git.kernel.org/stable/c/df944dc46d06af65a75191183d52be017e6b9dbe
• https://git.kernel.org/stable/c/e68c8323355e8cedfbe0bec7d5a39009f61640b6
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

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