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.
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.
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.