fuse: re-lock request before returning from fuse_ref_folio()
Summary
| CVE | CVE-2026-64266 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-25 10:17:06 UTC |
| Updated | 2026-07-30 15:00:27 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001600000 probability, percentile 0.055930000 (date 2026-08-01)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 1f9156714592356b4fda57beac7eab9c2a462dd3 git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 5630da218a45ba80f0aba0846cbe8aa655da122b git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 1ca605cfa59377f0143fb35b5b01360f37d1b7c4 git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 0e4a5a000123d81234e27a2f8187688cf608f755 git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 e6aa539720c3d8def69683ed0c07cf9faea4e8be git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 be353caffa8640f5e25fb3714ce8b0cef5e410e5 git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 65a1c2551f7e16085acbb54aedde1feaa559ba7a git | Not specified |
| CNA | Linux | Linux | affected c3021629a0d820247ee12b6c5192a1d5380e21c6 b5befa80fdbe287a98480effed9564712924add5 git | Not specified |
| CNA | Linux | Linux | affected 2.6.35 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.35 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.96 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.39 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.4 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8be | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.