CVE record · CVE-2026-90300

bpf: Clear buf on error in __bpf_get_task_stack

No CVSS scoreEPSS 0.0021 · 10th percentile

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before 5c4c57a277a87ed235183d03b671d346f5101f62 git affected 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before 4acc761b4e3feca1eb648d21fc4d665b23c5372d git affected 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before 6f5a7bcc049709af12e403111d5e73e80910dafc git affected 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before 1f0f61573ba4cb899105b5cef65be3ca02205f93 git affected 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before f523359c4789bb0396d2d642464a6e2fd4f2299d git affected 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df to before f5d242825ca417bb6afe35fde6e8880f97ca43fb git affected d921baabd96445ef9c9c9410ca06164359c8a1a5 git affected 9c020a533eaae1c2d41a7e3835c4c818a9b4b656 git affected ff6bdc205fd0a83bd365405d4e31fb5905826996 git affected 5.10.30 to before 5.11 semver affected 5.11.14 to before 5.12 semver affected 5.10.96 to before 5.11 semver Other versions: unaffected
Linux	Linux	affected 5.12 unaffected before 5.12 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.114 to 6.12., inclusive semver unaffected 6.18.57 to 6.18., inclusive semver unaffected 7.2.6 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-90300
CNA: Linux
Tags: Linux kernel
Published: 17 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 BPF helper `__bpf_get_task_stack`, used by `bpf_get_task_stack` and `bpf_get_task_stack_sleepable`, can leave its output buffer uninitialized on error paths. Versions from 5.12 up to the fixed releases are affected. The source gives few details on what an attacker could do with this. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.57 (or later in those branches), or to a kernel release that includes the fix.

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

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0021, the 10th percentile, on 13 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 17 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.