Answer in brief
CVE-2026-72225 records a Unknown severity 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). 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.
Answer in brief
CVE-2026-72225 records a Unknown severity 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). 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.