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CVE-2026-72181

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-72181 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
0.16%

6.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 2f7730c03a9deea3ba7a1c980070d363b4ea2046; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < d20ee42f8226607b5693b2bc2f115ca2d270221a; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 15ba8053fe4162c933855f1676fb321cdb6251c7; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 3446ffb5d03c36f9ce88ede7ca5be319a2968d96; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 87a56c1e8e36d06ebe8640432f911538ded7827d; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 1caee6e084a96ada94658f261ced377d85af3f03; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c; >= 295cbf6d63165fe4253cf1d9ceadcda47a318b48, < 98e37db4a34d3af3fb2f4648295c25b5e40b20e3
LinuxLinux2.6.23

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-72181?
CVE-2026-72181 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72181?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST