CVE-2025-39800

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.

Score

CVSS 3.1 7.8 High

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2025-09-15

Last modified

2026-10-19

Affected products

• Debian Linux (Debian)
• Linux Kernel (Linux)
• Simatic Cn 4100 (Siemens)

References

• https://git.kernel.org/stable/c/4290e34fb87ae556b12c216efd0ae91583446b7a
• https://git.kernel.org/stable/c/4734255ef39b416864139dcda96a387fe5f33a6a
• https://git.kernel.org/stable/c/da2124719f386b6e5d4d4b1a2e67c440e4d5892f
• https://git.kernel.org/stable/c/f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3
• https://git.kernel.org/stable/c/33e8f24b52d2796b8cfb28c19a1a7dd6476323a8
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
• https://cert-portal.siemens.com/productcert/html/ssa-032379.html