CVE-2026-98799
kernel: bpf: Skip detached progs in trampoline images that are still in use
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 24, 2026
Description
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. When a BPF program attached to a trampoline is detached while another task is paused in an active routine, the kernel can prematurely release the detached program from memory. A local user could exploit this race condition when the paused task resumes execution, causing the kernel to access freed memory and resulting in a system crash and 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 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference