mips: sched: Fix CPUMASK_OFFSTACK memory corruption
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.23 and later | 5.10.265, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.23 and later Fixed in 5.10.265, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-72181
- 2026-10-03 Alias added: GHSA-792p-r5w2-5gfr
References
Other 8
- https://git.kernel.org/stable/c/2f7730c03a9deea3ba7a1c980070d363b4ea2046
- https://git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a
- https://git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7
- https://git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96
- https://git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d
- https://git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03
- https://git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c
- https://git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3
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Sources
- CVE-2026-72181 · CVE Program
- CVE-2026-72181 · NVD
- FIRST EPSS
- GHSA-792p-r5w2-5gfr · GitHub Advisory Database · CC BY 4.0
- CVE-2026-72181 · Red Hat security data · CC BY 4.0
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