CVE-2026-90143
kernel: net: kcm: Hold RCU read lock while running BPF parser
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 13, 2026
Description
A flaw was found in the Linux kernel's KCM (Kernel Connection Multiplexer) component. The kcm_parse_func_strparser() function, which runs a BPF (Berkeley Packet Filter) parser, does not properly hold an RCU (Read-Copy-Update) read lock. This oversight can lead to BPF map operations triggering a warning, potentially causing system instability or a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-414 · Missing Lock Check