CVE-2025-39800high

CVE-2025-39800: high-severity vulnerability in Linux

btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()

Published · Updated

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 95% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: btrfs: abort transaction on unexpected eb generation at btrfs_copy_root() If we find an unexpected generation for the extent buffer we are cloning at btrfs_copy_root(), we just WARN_ON() and don't error out and abort the transaction, meaning we allow to persist metadata with an unexpected generation. Instead of warning only, abort the transaction and return -EUCLEAN.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://cert-portal.siemens.com/productcert/html/ssa-032379.htmlhttps://git.kernel.org/stable/c/33e8f24b52d2796b8cfb28c19a1a7dd6476323a8https://git.kernel.org/stable/c/4290e34fb87ae556b12c216efd0ae91583446b7ahttps://git.kernel.org/stable/c/4734255ef39b416864139dcda96a387fe5f33a6ahttps://git.kernel.org/stable/c/da2124719f386b6e5d4d4b1a2e67c440e4d5892fhttps://git.kernel.org/stable/c/f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html