CVE-2026-90143high

CVE-2026-90143: high-severity vulnerability in Linux

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

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/1d26a6e007d46babc7fa76e5a157dccf86cd55c0https://git.kernel.org/stable/c/21526f8a191a3c50622b8c10bd927870d780eae4https://git.kernel.org/stable/c/292846223eaddba890e40699d2ab82ee5671798chttps://git.kernel.org/stable/c/37108861cf7bd909d4a372069bcd61c8f489e232https://git.kernel.org/stable/c/3c70d27e792a28bca650ddd8a9aa0fe3591ffec5https://git.kernel.org/stable/c/b0346dd64e4905291cc9c479f2e6cf1884ced4e6https://git.kernel.org/stable/c/b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2https://git.kernel.org/stable/c/f392affef3c9ce64dfdde794df0579e0a7793440