CVE-2026-100074

bpf: Mark bpf_refcount field as unique

CVE-2026-100074 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-100074, released September 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0016

4th percentile

In the Linux kernel, the following vulnerability has been resolved: bpf: Mark bpf_refcount field as unique BPF_REFCOUNT is not marked as a unique field, while it should be. Fix this oversight.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
bpftool6.18 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
bpftool6.18-debuginfo · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel-livepatch-6.18.54-121.166 · amzn 2023	1:1.0-0.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-debuginfo · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-devel · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-headers · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-modules-extra · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-modules-extra-common · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-tools · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-tools-debuginfo · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
kernel6.18-tools-devel · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
linux · Debian 13.5 (trixie)	6.12.115-2	DEBIAN-CVE-2026-100074	Sep 25, 2026
linux · Debian 14	7.2.6-1	DEBIAN-CVE-2026-100074	Sep 25, 2026
microvm-kernel6.18 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
perf6.18 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
perf6.18-debuginfo · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
python3-perf6.18 · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026
python3-perf6.18-debuginfo · amzn 2023	1:6.18.54-121.166.amzn2023	ALAS2023-2026-3192	Nov 7, 2026

Details

Published
September 25, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100074

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