lib: cpu_rmap: Avoid use after free on rmap->obj array entries

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-53484
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-01 12:15:51 UTC
Updated2026-08-04 10:19:08 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free. Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap(). The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.

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

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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

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 896f97ea95c1d29c0520ee0766b66b7f64cb967c 981f339d2905b6a92ef59358158b326493aecac5 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c d1308bd0b24cb1d78fa2747d5fa3e055cc628a48 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c f748e15253833b771acbede14ea98f50831ac289 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c c6ed54dd90698dc0744d669524cc1c122ded8a16 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4 git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c 67bca5f1d644f4e79b694abd8052a177de81c37f git Not specified
CNA Linux Linux affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c 4e0473f1060aa49621d40a113afde24818101d37 git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 4.14.316 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.284 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.244 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.181 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.113 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.30 6.1.* semver Not specified
CNA Linux Linux unaffected 6.3.4 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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