CVE-2026-98628
kernel: bpf: Make post-verification instruction rewrites killable
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 21, 2026
Description
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A privileged local user can cause a Denial of Service (DoS) by loading a specially crafted BPF program containing numerous redundant instructions that trigger intensive post-verification cleanup. Because these rewrite operations do not check for termination signals or yield processor time, the task enters an uninterruptible state that ignores termination requests until the work completes, leading to prolonged resource consumption.
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 · 2.3CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
CWE-606 · Unchecked Input for Loop Condition