CVE-2026-90143

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < 37108861cf7bd909d4a372069bcd61c8f489e232affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < 3c70d27e792a28bca650ddd8a9aa0fe3591ffec5affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < 1d26a6e007d46babc7fa76e5a157dccf86cd55c0affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < 21526f8a191a3c50622b8c10bd927870d780eae4affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < 292846223eaddba890e40699d2ab82ee5671798caffected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < f392affef3c9ce64dfdde794df0579e0a7793440affected
LinuxLinux9b73896a81dc68a638a011877b7344b252f92276 < b0346dd64e4905291cc9c479f2e6cf1884ced4e6affected
LinuxLinux4.9affected
LinuxLinux0 < 4.9unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References