Local kernel compromise via liveupdate session race
Published Aug 15, 2026 · Updated Aug 15, 2026
Use-after-free in Linux 6.19 liveupdate session retrieval allows local users to corrupt kernel memory through concurrent session release. A concurrent thread can release and free a session after lookup but before luo_session_retrieve() acquires its mutex because the read lock ends too early. Exploitation requires local access to the liveupdate session interface and precise race timing, and can expose or alter kernel data or crash the system.
Summary
What happened
Use-after-free in Linux 6.19 liveupdate session retrieval allows local users to corrupt kernel memory through concurrent session release. A concurrent thread can release and free a session after lookup but before luo_session_retrieve() acquires its mutex because the read lock ends too early. Exploitation requires local access to the liveupdate session interface and precise race timing, and can expose or alter kernel data or crash the system.
The record
- CVE
- CVE-2026-74370
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0153094d03df5a2e834a19c59b255649a258ae46 <d3ae9e7fddb4036f50003d7fa1ef52801fdb961b
- Affected versionversion=0153094d03df5a2e834a19c59b255649a258ae46 <d944170607b872a1f93713c555ad3f0efde3a9b8
- Affected versionversion=6.19
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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