Answer in brief
CVE-2026-72225 records a High severity (CVSS 7.8) vulnerability in jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <e144ad0250f77e23e28949587b8b57e40dc3b512 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <fb9b49618ed7296ebfad62a3835da8945f727001 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <78955fdce8ff654e6d33a2fa90882a1e7eb26330 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <a58fc10adf503969fec2007b5afe8987258046c4 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <289a2ca0c9b7eae74f93fc213b0b971669b8683d | e144ad0250f77e23e28949587b8b57e40dc3b512, 4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6, fb9b49618ed7296ebfad62a3835da8945f727001, 4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9, 78955fdce8ff654e6d33a2fa90882a1e7eb26330, a58fc10adf503969fec2007b5afe8987258046c4, 289a2ca0c9b7eae74f93fc213b0b971669b8683d |
| Linux/Linuxgeneric | 5.10 | Not reported |
| Linux/Linuxgeneric | >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <aa90f00932bf572d6ef284c977c2a60b39c13bd6 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <e144ad0250f77e23e28949587b8b57e40dc3b512 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <fb9b49618ed7296ebfad62a3835da8945f727001 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <78955fdce8ff654e6d33a2fa90882a1e7eb26330 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <a58fc10adf503969fec2007b5afe8987258046c4 || >=6866d7b3f2bb4f011041ba54c98b1584497fe2fd <289a2ca0c9b7eae74f93fc213b0b971669b8683d | aa90f00932bf572d6ef284c977c2a60b39c13bd6, e144ad0250f77e23e28949587b8b57e40dc3b512, 4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6, fb9b49618ed7296ebfad62a3835da8945f727001, 4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9, 78955fdce8ff654e6d33a2fa90882a1e7eb26330, a58fc10adf503969fec2007b5afe8987258046c4, 289a2ca0c9b7eae74f93fc213b0b971669b8683d |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit() jbd2_journal_initialize_fast_commit() validates journal capacity by checking (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS). Both j_last and num_fc_blks are unsigned, so when num_fc_blks exceeds j_last the subtraction wraps to a large value, bypassing the bounds check. The resulting underflow corrupts j_last, j_fc_first, and j_free, leading to journal abort. Fix by checking num_fc_blks against j_last before the subtraction, returning -EFSCORRUPTED.
Quoted source text, attributed separately from HOL analysis.