f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63812
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 12:16:54 UTC
Updated2026-07-20 15:16:47 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node() When __destroy_extent_node() sets the inode flag FI_NO_EXTENT, it does not reset the length of the largest extent to 0 and update the inode folio. Since modifications to the extent tree are disallowed afterward, the cached largest extent may become stale. This can trigger the following error in xfstests generic/388: F2FS-fs (dm-0): sanity_check_extent_cache: inode (ino=1761) extent info [220057, 57, 6] is incorrect, run fsck to fix In the f2fs_drop_inode path, __destroy_extent_node() does not need to guarantee that et->node_cnt is 0, because concurrency with writeback is expected in this path, and writeback may update the extent cache. This patch reverts commit ed78aeebef05 ("f2fs: fix node_cnt race between extent node destroy and writeback"), and remove the unnecessary zero check of et->node_cnt.

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: 0.001560000 probability, percentile 0.052040000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 42dd1c91f993431d0b399502479d00e6ad1bca71 7e4d8f98be63f98856a5176b9188dada6e7ba9ee git Not specified
CNA Linux Linux affected ab1eaf9d5c99042f5b0243bf67a06283a4c0757f 58a5deb220bcac4c73bf58954c0845644c997487 git Not specified
CNA Linux Linux affected b0e4395870eb3441ddc959f6710b5f6ca61aff26 20190e498057997532c7f186d081011f18e0a462 git Not specified
CNA Linux Linux affected ed78aeebef05212ef7dca93bd931e4eff67c113f edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7 git Not specified
CNA Linux Linux affected ed78aeebef05212ef7dca93bd931e4eff67c113f 1f70ddb28a3c71df124da5fa4040c808116d6bb9 git Not specified
CNA Linux Linux affected 0559a0e962aacbb47519e26ee663be04b72dcb92 git Not specified
CNA Linux Linux affected 6.6.140 6.6.144 semver Not specified
CNA Linux Linux affected 6.12.88 6.12.95 semver Not specified
CNA Linux Linux affected 6.18.30 6.18.38 semver Not specified
CNA Linux Linux affected 7.0.7 7.1 semver Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 6.6.144 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.95 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.38 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.3 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7e4d8f98be63f98856a5176b9188dada6e7ba9ee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/58a5deb220bcac4c73bf58954c0845644c997487 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1f70ddb28a3c71df124da5fa4040c808116d6bb9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/20190e498057997532c7f186d081011f18e0a462 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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