CVE Catalog

CVE-2026-74370

Low risk· EPSS 5%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.16%

5th percentile - higher than 5% of all known CVEs

Summary

In the Linux kernel, a TOCTOU race in luo_session_retrieve() of the liveupdate mechanism has been fixed. The rwsem_read lock scope was extended to overlap with the session mutex acquisition, preventing a concurrent thread from releasing and freeing the session between lookup and mutex lock.

Risk Assessment

The vulnerability could lead to use-after-free or race conditions, potentially enabling local privilege escalation or system instability.

Recommendation

Apply the official Linux kernel patch containing this fix as soon as possible and update systems to a patched kernel version.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: liveupdate: fix TOCTOU race in luo_session_retrieve() Extend the scope of the rwsem_read lock in luo_session_retrieve() to overlap with the acquisition of the session mutex. This prevents a concurrent thread from releasing and freeing the session between the lookup and the mutex lock.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS