CVE-2026-98035
kernel: bpf: Cancel special fields when recycling rhtab elements
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's BPF subsystem. When updating or deleting elements in resizable hash tables, the kernel directly releases special object fields rather than safely deferring their cancellation, which is not safe when running in Non-Maskable Interrupt (NMI) context. A local user capable of running BPF programs could exploit this flaw to cause a kernel crash, resulting in a denial of service (DoS).
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-663 · Use of a Non-reentrant Function in a Concurrent Context