Answer in brief
CVE-2026-64266 records a High severity (CVSS 7.8) vulnerability in fuse: re-lock request before returning from fuse_ref_folio(). 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <1f9156714592356b4fda57beac7eab9c2a462dd3 || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <5630da218a45ba80f0aba0846cbe8aa655da122b || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <1ca605cfa59377f0143fb35b5b01360f37d1b7c4 || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <0e4a5a000123d81234e27a2f8187688cf608f755 || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <e6aa539720c3d8def69683ed0c07cf9faea4e8be || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <be353caffa8640f5e25fb3714ce8b0cef5e410e5 || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <65a1c2551f7e16085acbb54aedde1feaa559ba7a || >=c3021629a0d820247ee12b6c5192a1d5380e21c6 <b5befa80fdbe287a98480effed9564712924add5 | 1f9156714592356b4fda57beac7eab9c2a462dd3, 5630da218a45ba80f0aba0846cbe8aa655da122b, 1ca605cfa59377f0143fb35b5b01360f37d1b7c4, 0e4a5a000123d81234e27a2f8187688cf608f755, e6aa539720c3d8def69683ed0c07cf9faea4e8be, be353caffa8640f5e25fb3714ce8b0cef5e410e5, 65a1c2551f7e16085acbb54aedde1feaa559ba7a, b5befa80fdbe287a98480effed9564712924add5 |
| Linux/Linuxgeneric | 2.6.35 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before returning from fuse_ref_folio() fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues. Fix this by locking the request in fuse_ref_folio() before returning.
Quoted source text, attributed separately from HOL analysis.