mtd: docg3: fix use-after-free in docg3_release()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-46285
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-08 17:16:46 UTC
Updated2026-07-08 21:29:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mtd: docg3: fix use-after-free in docg3_release() In docg3_release(), the docg3 pointer is obtained from cascade->floors[0]->priv before the loop that calls doc_release_device() on each floor. doc_release_device() frees the docg3 struct via kfree(docg3) at line 1881. After the loop, docg3->cascade->bch dereferences the already-freed pointer. Fix this by accessing cascade->bch directly, which is equivalent since docg3->cascade points back to the same cascade struct, and is already available as a local variable. This also removes the now-unused docg3 local variable.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001260000 probability, percentile 0.026410000 (date 2026-07-09)

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d 8408655ec8344511667b61d8257dc59c80ee3391 git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d f5d2ed4ed47d3906e2495a3537a48b127f497a17 git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d 2bf706fe7831b319f23a85b9728f961cfed40c3e git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d d26f8c361f751c188b7ebaf8189aa0258968fd98 git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d 16f6588a3b7a2a20d10ad9b766be74c60ba347cc git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d d89044889ecd11b0c2f86663597246e9bdd25679 git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d d49628d63d4e6bbc8a1621afb88e5fc901611bee git Not specified
CNA Linux Linux affected c8ae3f744ddca0da164bcacee42d1d4b6fe7027d ca19808bc6fac7e29420d8508df569b346b3e339 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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