Answer in brief
CVE-2025-68794 records a Critical severity (CVSS 9.8) vulnerability in iomap: adjust read range correctly for non-block-aligned positions. 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.
CVSS is 9.8. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9dc55f1389f9569acf9659e58dd836a9c70df217 <ce20f49ac9194cf81a77f01d1c316d7c17ae753c || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <275b37a1e5c2c8abd313e8075f6aec9a349f291b || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <82b60ffbb532d919959702768dca04c3c0500ae5 || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <142194fb21afe964d2d194cab1fc357cbf87e899 || >=9dc55f1389f9569acf9659e58dd836a9c70df217 <7aa6bc3e8766990824f66ca76c19596ce10daf3e | ce20f49ac9194cf81a77f01d1c316d7c17ae753c, 275b37a1e5c2c8abd313e8075f6aec9a349f291b, b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac, 82b60ffbb532d919959702768dca04c3c0500ae5, 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e, 142194fb21afe964d2d194cab1fc357cbf87e899, 7aa6bc3e8766990824f66ca76c19596ce10daf3e |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Jan 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 27, 2026
In the Linux kernel, the following vulnerability has been resolved: iomap: adjust read range correctly for non-block-aligned positions iomap_adjust_read_range() assumes that the position and length passed in are block-aligned. This is not always the case however, as shown in the syzbot generated case for erofs. This causes too many bytes to be skipped for uptodate blocks, which results in returning the incorrect position and length to read in. If all the blocks are uptodate, this underflows length and returns a position beyond the folio. Fix the calculation to also take into account the block offset when calculating how many bytes can be skipped for uptodate blocks.
Quoted source text, attributed separately from HOL analysis.