CVE record · CVE-2026-89799

bpf: Disable preemption in bpf_get_stackid

CVSS 7.8 HighEPSS 0.0018 · 7th percentile

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before 01fc93f670b3e759413a4d574c18ccfc636d2728 git affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before e79a70c2e97ae36bbdd371f0ce88a525f7b49f01 git affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before 18c71e4b65ee60b8611fc071bdd7159f10185117 git affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before ccf481d73bce6e851cec364fe831c86fe66877cf git affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf git affected d5a3b1f691865be576c2bffa708549b8cdccda19 to before 15f1bd8574662f1b7b26aaa2e23ebf4066f0117d git Other versions: unaffected
Linux	Linux	affected 4.6 unaffected before 4.6 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.111 to 6.12., inclusive semver unaffected 6.18.51 to 6.18., inclusive semver unaffected 7.2.5 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-89799
CNA: Linux
Tags: Linux kernel
Published: 16 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel from version 4.6 is affected by a bug in the BPF bpf_get_stackid function, which did not disable preemption while using its call-trace buffer. The source gives few details on attacker requirements or impact. Upgrade to Linux kernel 6.1.191, 6.6.160, 6.12.111, or 6.18.51, or a later release in those series.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (Linux)

CISA KEV Not listed.
EPSS 0.0018, the 7th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 16 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.