CVE-2026-80775

A flaw was found in the Linux kernel. A race condition exists in the futex_hash_allocate() function, specifically during the initial allocation of mm->futex.phash.ref. This vulnerability can be triggered in scenarios involving nested vfork calls, where a parent and grandchild process might concurrently attempt to set futex hash slots. This race can lead to a use-after-free condition, allowing a task to write into freed memory, which results in memory corruption.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.