Medium severity · published Sep 15, 2025
CVE-2025-39800
btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.29 before 6.1.149; 6.2 before 6.6.103; 6.7 before 6.12.44; 6.13 before 6.16.4 · source: NVD
LI
Linux · Linux
be20aa9dbadc8c06283784ee12bbc0d97dea3418 before 4290e34fb87ae556b12c216efd0ae91583446b7a; be20aa9dbadc8c06283784ee12bbc0d97dea3418 before 4734255ef39b416864139dcda96a387fe5f33a6a; be20aa9dbadc8c06283784ee12bbc0d97dea3418 before da2124719f386b6e5d4d4b1a2e67c440e4d5892f; be20aa9dbadc8c06283784ee12bbc0d97dea3418 before f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3; be20aa9dbadc8c06283784ee12bbc0d97dea3418 before 33e8f24b52d2796b8cfb28c19a1a7dd6476323a8; 2.6.29 · source: vendor
DL
Debian Linux · Debian
11.0 · source: NVD
SC
SIMATIC CN 4100 · Siemens
before V5.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-39800
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-39800
Patch
https://git.kernel.org/stable/c/33e8f24b52d2796b8cfb28c19a1a7dd6476323a8
Patch
https://git.kernel.org/stable/c/4290e34fb87ae556b12c216efd0ae91583446b7a
Patch
https://git.kernel.org/stable/c/4734255ef39b416864139dcda96a387fe5f33a6a
Patch
https://git.kernel.org/stable/c/da2124719f386b6e5d4d4b1a2e67c440e4d5892f
Patch
https://git.kernel.org/stable/c/f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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