CVE-2024-42314

btrfs: fix extent map use-after-free when adding pages to compressed bio

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

17 Aug 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when adding pages to compressed bio At add_ra_bio_pages() we are accessing the extent map to calculate 'add_size' after we dropped our reference on the extent map, resulting in a use-after-free. Fix this by computing 'add_size' before dropping our extent map reference.

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/8e7860543a94784d744c7ce34b78a2e11beefa5c https://git.kernel.org/stable/c/b7859ff398b6b656e1689daa860eb34837b4bb89 https://git.kernel.org/stable/c/c1cc3326e27b0bd7a2806b40bc48e49afaf951e7 https://git.kernel.org/stable/c/c205565e0f2f439f278a4a94ee97b67ef7b56ae8 https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html