What is CVE-2026-45886?

CVE-2026-45886 is a medium-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2026-05-27.

How severe is CVE-2026-45886?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux

CVE-2026-45886

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_xdp_store_bytes proto for read-only arg While making some maps in Cilium read-only from the BPF side, we noticed that the bpf_xdp_store_bytes proto is incor…

EPSS: 0.002 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 3f364222d032eea6b245780e845ad213dab28cdd, 5.18, 0
Linux Linux_kernel

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-45886?: CVE-2026-45886 is a medium-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2026-05-27.
How severe is CVE-2026-45886?: Medium severity. CVSS v3 base score is 5.5 out of 10.