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CVE-2026-90143

HIGHCVSS 7.8/10

Last modified

CVE-2026-90143 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program..

Description

In the Linux kernel, the following vulnerability has been resolved: net: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 9b73896a81dc68a638a011877b7344b252f92276, < 37108861cf7bd909d4a372069bcd61c8f489e232; >= 9b73896a81dc68a638a011877b7344b252f92276, < 3c70d27e792a28bca650ddd8a9aa0fe3591ffec5; >= 9b73896a81dc68a638a011877b7344b252f92276, < 1d26a6e007d46babc7fa76e5a157dccf86cd55c0; >= 9b73896a81dc68a638a011877b7344b252f92276, < b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2; >= 9b73896a81dc68a638a011877b7344b252f92276, < 21526f8a191a3c50622b8c10bd927870d780eae4; >= 9b73896a81dc68a638a011877b7344b252f92276, < 292846223eaddba890e40699d2ab82ee5671798c; >= 9b73896a81dc68a638a011877b7344b252f92276, < f392affef3c9ce64dfdde794df0579e0a7793440; >= 9b73896a81dc68a638a011877b7344b252f92276, < b0346dd64e4905291cc9c479f2e6cf1884ced4e6
LinuxLinux4.9

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90143?
In the Linux kernel, the following vulnerability has been resolved: net: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program.
How severe is CVE-2026-90143?
CVE-2026-90143 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-90143?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST