Answer in brief
CVE-2026-46289 records a Critical severity (CVSS 9.8) vulnerability in lib/scatterlist: fix length calculations in extract_kvec_to_sg. 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 | >=0185846975339a5c348373aa450a977f5242366b <3f17500e86d730c76db638bb3ae52f9b5e496c76 || >=0185846975339a5c348373aa450a977f5242366b <e5e22fc9963469e678c4f4bb38d26adcec107f1e || >=0185846975339a5c348373aa450a977f5242366b <8fbba6829057979149d1b37d65690c037f3ddf4d || >=0185846975339a5c348373aa450a977f5242366b <9d38756d0a93b66163554219fa9c3365f40c4035 || >=0185846975339a5c348373aa450a977f5242366b <07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45 | 3f17500e86d730c76db638bb3ae52f9b5e496c76, e5e22fc9963469e678c4f4bb38d26adcec107f1e, 8fbba6829057979149d1b37d65690c037f3ddf4d, 9d38756d0a93b66163554219fa9c3365f40c4035, 07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45 |
| Linux/Linuxgeneric | 6.3 | Not reported |
Published upstream
Jun 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 7, 2026
In the Linux kernel, the following vulnerability has been resolved: lib/scatterlist: fix length calculations in extract_kvec_to_sg Patch series "Fix bugs in extract_iter_to_sg()", v3. Fix bugs in the kvec and user variants of extract_iter_to_sg. This series is growing due to useful remarks made by sashiko.dev. The main bugs are: - The length for an sglist entry when extracting from a kvec can exceed the number of bytes in the page. This is obviously not intended. - When extracting a user buffer the sglist is temporarily used as a scratch buffer for extracted page pointers. If the sglist already contains some elements this scratch buffer could overlap with existing entries in the sglist. The series adds test cases to the kunit_iov_iter test that demonstrate all of these bugs. Additionally, there is a memory leak fix for the test itself. The bugs were orignally introduced into kernel v6.3 where the function lived in fs/netfs/iterator.c. It was later moved to lib/scatterlist.c in v6.5. Thus the actual fix is only marked for backports to v6.5+. This patch (of 5): When extracting from a kvec to a scatterlist, do not cross page boundaries. The required length was already calculated but not used as intended. Adjust the copied length if the loop runs out of sglist entries without extracting everything. While there, return immediately from extract_iter_to_sg if there are no sglist entries at all. A subsequent commit will add kunit test cases that demonstrate that the patch is necessary.
Quoted source text, attributed separately from HOL analysis.