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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

Published

2026-09-17

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/stable/c/1d26a6e007d46babc7fa76e5a157dccf86cd55c0
• https://git.kernel.org/stable/c/21526f8a191a3c50622b8c10bd927870d780eae4
• https://git.kernel.org/stable/c/292846223eaddba890e40699d2ab82ee5671798c
• https://git.kernel.org/stable/c/37108861cf7bd909d4a372069bcd61c8f489e232
• https://git.kernel.org/stable/c/3c70d27e792a28bca650ddd8a9aa0fe3591ffec5

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