What’s Vulnerable › Vulnerabilities

CVE-2026-74370: liveupdate: fix TOCTOU race in luo_session_retrieve()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

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.

Affected products

• Linux kernel: 6.19 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/d3ae9e7fddb4036f50003d7fa1ef52801fdb961b
• https://git.kernel.org/stable/c/d944170607b872a1f93713c555ad3f0efde3a9b8

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