CVE-2026-72181

In 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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7
https://git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03
https://git.kernel.org/stable/c/2f7730c03a9deea3ba7a1c980070d363b4ea2046
https://git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96
https://git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d
https://git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3
https://git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c
https://git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-19 17:21

NVD link : CVE-2026-72181

Mitre link : CVE-2026-72181

CVE.ORG link : CVE-2026-72181

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-72181", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "2f7730c03a9deea3ba7a1c980070d363b4ea2046", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "d20ee42f8226607b5693b2bc2f115ca2d270221a", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "15ba8053fe4162c933855f1676fb321cdb6251c7", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "3446ffb5d03c36f9ce88ede7ca5be319a2968d96", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "87a56c1e8e36d06ebe8640432f911538ded7827d", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "1caee6e084a96ada94658f261ced377d85af3f03", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c", "versionType": "git"}, {"status": "affected", "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48", "lessThan": "98e37db4a34d3af3fb2f4648295c25b5e40b20e3", "versionType": "git"}], "programFiles": ["arch/mips/kernel/mips-mt-fpaff.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.23"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.23", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.265", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/mips/kernel/mips-mt-fpaff.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:21:36.393", "references": [{"url": "https://git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2f7730c03a9deea3ba7a1c980070d363b4ea2046", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmips: sched: Fix CPUMASK_OFFSTACK memory corruption\n\nThis patch addresses a critical memory management flaw. When\nCONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer.\nConsequently, sizeof(new_mask) evaluates to the pointer size, causing\ncopy_from_user() to clobber the mask pointer. Furthermore, the old\nlogic performed copy_from_user() before allocating the mask.\n\nFix this by allocating new_mask first. To handle variable-sized user\nmasks correctly, use cpumask_size() to truncate overly large user masks\nor pad undersized masks with zeros before copying the data directly into\nthe allocated buffer."}], "lastModified": "2026-08-19T17:21:00.547", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}