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

What is CVE-2024-49877?

CVE-2024-49877 is a medium-severity vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2024-49877?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-49877?

Apply the vendor's patch.

Is CVE-2024-49877 being exploited?

There is no known exploitation of CVE-2024-49877 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-51193, AZL-51276, BELL-CVE-2024-49877, DEBIAN-CVE-2024-49877, GHSA-7jfp-wvrj-m47g, UBUNTU-CVE-2024-49877.