CVE-2026-90210
kernel: bpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure
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) component. This use-after-free (UAF) vulnerability occurs when the bpf_trampoline_update() function fails during an update operation. This failure can lead to a previously freed memory region being accessed, potentially resulting in system instability, denial of service, or the execution of arbitrary code.
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-825 · Expired Pointer Dereference