btrfs: fix extent map use-after-free when adding pages to compressed bio
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/8e7860543a94784d744c7ce34b78a2e11beefa5chttps://git.kernel.org/stable/c/b7859ff398b6b656e1689daa860eb34837b4bb89https://git.kernel.org/stable/c/c1cc3326e27b0bd7a2806b40bc48e49afaf951e7https://git.kernel.org/stable/c/c205565e0f2f439f278a4a94ee97b67ef7b56ae8https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html