CVE-2026-100074 bpf: Mark bpf_refcount field as unique

What is CVE-2026-100074?

CVE-2026-100074 is a medium-severity vulnerability in Linux kernel, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2026-100074?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-100074?

Apply the vendor's patch.

Is CVE-2026-100074 being exploited?

There is no known exploitation of CVE-2026-100074 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-104711, BELL-CVE-2026-100074, DEBIAN-CVE-2026-100074, GHSA-5973-rj98-r6wc, UBUNTU-CVE-2026-100074.