Answer in brief
CVE-2026-31694 records a High severity (CVSS 7.8) vulnerability in fuse: reject oversized dirents in page cache. 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 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=27992ef80770d61a57f6c3a551735b08cefdffa3 <7de93abfaae1b2dc94da8a07a36421bd073f1d8f || >=27992ef80770d61a57f6c3a551735b08cefdffa3 <474ce83c96a55f2eeb14dee2be375eeadfdacdf5 || >=27992ef80770d61a57f6c3a551735b08cefdffa3 <51a8de6c50bf947c8f534cd73da4c8f0a13e7bed | 7de93abfaae1b2dc94da8a07a36421bd073f1d8f, 474ce83c96a55f2eeb14dee2be375eeadfdacdf5, 51a8de6c50bf947c8f534cd73da4c8f0a13e7bed |
| Linux/Linuxgeneric | 6.15 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks whether the dirent fits in the remaining space of the current page and advances to a fresh page if not. It never checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that cannot fit in a single page before copying them into the readdir cache.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-31694 records a High severity (CVSS 7.8) vulnerability in fuse: reject oversized dirents in page cache. 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 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=27992ef80770d61a57f6c3a551735b08cefdffa3 <7de93abfaae1b2dc94da8a07a36421bd073f1d8f || >=27992ef80770d61a57f6c3a551735b08cefdffa3 <474ce83c96a55f2eeb14dee2be375eeadfdacdf5 || >=27992ef80770d61a57f6c3a551735b08cefdffa3 <51a8de6c50bf947c8f534cd73da4c8f0a13e7bed | 7de93abfaae1b2dc94da8a07a36421bd073f1d8f, 474ce83c96a55f2eeb14dee2be375eeadfdacdf5, 51a8de6c50bf947c8f534cd73da4c8f0a13e7bed |
| Linux/Linuxgeneric | 6.15 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks whether the dirent fits in the remaining space of the current page and advances to a fresh page if not. It never checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that cannot fit in a single page before copying them into the readdir cache.
Quoted source text, attributed separately from HOL analysis.