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CVE-2026-90143

net: kcm: Hold RCU read lock while running BPF parser

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in 37108861cf7bd909d4a372069bcd61c8f489e232; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in 3c70d27e792a28bca650ddd8a9aa0fe3591ffec5; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in 1d26a6e007d46babc7fa76e5a157dccf86cd55c0; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in 21526f8a191a3c50622b8c10bd927870d780eae4; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in 292846223eaddba890e40699d2ab82ee5671798c; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in f392affef3c9ce64dfdde794df0579e0a7793440; From 9b73896a81dc68a638a011877b7344b252f92276 · fixed in b0346dd64e4905291cc9c479f2e6cf1884ced4e6

  • Linux Linux

    4.9

  • KernelLinux

    From 4.9.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8

git.kernel.org