ceph: fix oops due to invalid pointer for kfree() in parse_longname()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23201
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-14 17:15:57 UTC
Updated2026-09-14 12:17:39 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ceph: fix oops due to invalid pointer for kfree() in parse_longname() This fixes a kernel oops when reading ceph snapshot directories (.snap), for example by simply running `ls /mnt/my_ceph/.snap`. The variable str is guarded by __free(kfree), but advanced by one for skipping the initial '_' in snapshot names. Thus, kfree() is called with an invalid pointer. This patch removes the need for advancing the pointer so kfree() is called with correct memory pointer. Steps to reproduce: 1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase) 2. Add cephfs mount to fstab $ echo "[email protected]=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6 /mnt/test/stuff ceph acl,noatime,_netdev 0 0" >> /etc/fstab 3. Reboot the system $ systemctl reboot 4. Check if it's really mounted $ mount | grep stuff 5. List snapshots (expected 63 snapshots on my system) $ ls /mnt/test/stuff/.snap Now ls hangs forever and the kernel log shows the oops.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-476

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 4b9aee707c4580511983a0998547f3b28514e6a6 c9a129c82ddf82a50b4f8960d2609714ca2dbd26 git Not specified
CNA Linux Linux affected bb80f7618832d26f7e395f52f82b1dac76223e5f 8c9af7339de419819cfc641d551675d38ff99abf git Not specified
CNA Linux Linux affected 101841c38346f4ca41dc1802c867da990ffb32eb e258ed369c9e04caa7d2fd49785d753ae4034cb6 git Not specified
CNA Linux Linux affected 101841c38346f4ca41dc1802c867da990ffb32eb bc8dedae022ce3058659c3addef3ec4b41d15e00 git Not specified
CNA Linux Linux affected 3145b2b11492d61c512bbc59660bb823bc757f48 git Not specified
CNA Linux Linux affected 493479af8af3ab907f49e99323777d498a4fbd2b git Not specified
CNA Linux Linux affected 6.12.42 6.12.70 semver Not specified
CNA Linux Linux affected 6.15.10 6.16 semver Not specified
CNA Linux Linux affected 6.16.1 6.17 semver Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.12.70 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.10 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bc8dedae022ce3058659c3addef3ec4b41d15e00 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8c9af7339de419819cfc641d551675d38ff99abf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e258ed369c9e04caa7d2fd49785d753ae4034cb6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c9a129c82ddf82a50b4f8960d2609714ca2dbd26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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