CVE-2025-39800 Details
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.
A vulnerability in the Linux kernel's Btrfs file system has been addressed. The issue arose in the function 'btrfs_copy_root()', where an unexpected generation in the extent buffer was only logged as a warning. This oversight allowed metadata with incorrect generation information to be saved. The vulnerability has been corrected by changing the behavior to abort the transaction and return an error code, preventing the persistence of such metadata.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for updating the kernel can be found in the official Linux documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cert-portal.siemens.com/productcert/html/ssa-032379.html | siemens-SADP | |
| https://git.kernel.org/stable/c/33e8f24b52d2796b8cfb28c19a1a7dd6476323a8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4290e34fb87ae556b12c216efd0ae91583446b7a | kernel.org | Patch |
| https://git.kernel.org/stable/c/4734255ef39b416864139dcda96a387fe5f33a6a | kernel.org | Patch |
| https://git.kernel.org/stable/c/da2124719f386b6e5d4d4b1a2e67c440e4d5892f | kernel.org | Patch |
| https://git.kernel.org/stable/c/f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3 | kernel.org | Patch |
| https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html | CVE | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.29, < 6.1.149 >= 6.2, < 6.6.103 >= 6.7, < 6.12.44 >= 6.13, < 6.16.4 |
CPE
Remediation
| |
| debian debian linux | 11.0 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | siemens-SADP |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 12, 2026 | CVE Modified | siemens-SADP |
| Jan 16, 2026 | Initial Analysis | [email protected] |
| Nov 3, 2025 | CVE Modified | CVE |
| Sep 15, 2025 | New CVE Received | kernel.org |