libceph: make free_choose_arg_map() resilient to partial allocation

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Summary

CVECVE-2026-22991
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-23 16:15:55 UTC
Updated2026-04-27 14:16:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 5cf9c4a9959b6273675310d14a834ef14fbca37c 9b3730dabcf3764bfe3ff07caf55e641a0b45234 git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c 851241d3f78a5505224dc21c03d8692f530256b4 git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c ec1850f663da64842614c86b20fe734be070c2ba git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c 8081faaf089db5280c3be820948469f7c58ef8dd git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c f21c3fdb96833aac2f533506899fe38c19cf49d5 git Not specified
CNA Linux Linux affected 5cf9c4a9959b6273675310d14a834ef14fbca37c e3fe30e57649c551757a02e1cad073c47e1e075e git Not specified
CNA Linux Linux affected 4.13 Not specified
CNA Linux Linux unaffected 4.13 semver Not specified
CNA Linux Linux unaffected 5.10.248 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.198 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.161 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.121 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.66 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.6 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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