mips: sched: Fix CPUMASK_OFFSTACK memory corruption

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72181
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:36 UTC
Updated2026-08-17 06:18:18 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mips: sched: Fix CPUMASK_OFFSTACK memory corruption This patch addresses a critical memory management flaw. When CONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer. Consequently, sizeof(new_mask) evaluates to the pointer size, causing copy_from_user() to clobber the mask pointer. Furthermore, the old logic performed copy_from_user() before allocating the mask. Fix this by allocating new_mask first. To handle variable-sized user masks correctly, use cpumask_size() to truncate overly large user masks or pad undersized masks with zeros before copying the data directly into the allocated buffer.

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: 0.002060000 probability, percentile 0.109610000 (date 2026-08-16)

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 295cbf6d63165fe4253cf1d9ceadcda47a318b48 d20ee42f8226607b5693b2bc2f115ca2d270221a git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 15ba8053fe4162c933855f1676fb321cdb6251c7 git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 3446ffb5d03c36f9ce88ede7ca5be319a2968d96 git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 87a56c1e8e36d06ebe8640432f911538ded7827d git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 1caee6e084a96ada94658f261ced377d85af3f03 git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c git Not specified
CNA Linux Linux affected 295cbf6d63165fe4253cf1d9ceadcda47a318b48 98e37db4a34d3af3fb2f4648295c25b5e40b20e3 git Not specified
CNA Linux Linux affected 2.6.23 Not specified
CNA Linux Linux unaffected 2.6.23 semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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