CVE-2026-89799

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-21

AI risk analysis

Summary: This vulnerability allows an attacker to disable preemption in the bpf_get_stackid function, potentially leading to a high-impact exploit.
Exploitability: Exploitation requires preemption to be disabled, which is already the case for the bpf_get_stackid_pe function, making it harder to exploit.
Blast radius: If exploited, it could lead to high impact, including data compromise, integrity issues, and availability problems.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 5.19.10 or later.

kernelpreemptionbpf

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_get_stackid The get_perf_callchain call needs disabled preemption plus we need it disabled as long as we access its returned trace entries buffer. Note the bpf_get_stackid_pe function is executed already with preemption disabled.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.