Answer in brief
CVE-2025-39800 records a Unknown severity vulnerability in btrfs: abort transaction on unexpected eb generation at btrfs_copy_root(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=be20aa9dbadc8c06283784ee12bbc0d97dea3418 <4290e34fb87ae556b12c216efd0ae91583446b7a || >=be20aa9dbadc8c06283784ee12bbc0d97dea3418 <4734255ef39b416864139dcda96a387fe5f33a6a || >=be20aa9dbadc8c06283784ee12bbc0d97dea3418 <da2124719f386b6e5d4d4b1a2e67c440e4d5892f || >=be20aa9dbadc8c06283784ee12bbc0d97dea3418 <f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3 || >=be20aa9dbadc8c06283784ee12bbc0d97dea3418 <33e8f24b52d2796b8cfb28c19a1a7dd6476323a8 | 4290e34fb87ae556b12c216efd0ae91583446b7a, 4734255ef39b416864139dcda96a387fe5f33a6a, da2124719f386b6e5d4d4b1a2e67c440e4d5892f, f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3, 33e8f24b52d2796b8cfb28c19a1a7dd6476323a8 |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.