CVE-2026-90217
kernel: bpf: Compare iterator types during state pruning
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 Berkeley Packet Filter (BPF) verifier. The verifier, responsible for ensuring the safety of BPF programs, incorrectly compared iterator types during state pruning. This discrepancy between MEM_RCU and PTR_UNTRUSTED states could allow the verifier to prune an unsafe execution path, potentially leading to a security bypass.
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-1287 · Improper Validation of Specified Type of Input