What is CVE-2026-45989?

CVE-2026-45989 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-27.

How severe is CVE-2026-45989?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Linux

CVE-2026-45989

In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in testdrv_probe() The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately…

Vulnerability class: Use-After-Free

EPSS: 0.002 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 6.18.27, 7.1-rc1, 6.6.140
Linux Linux_kernel

Weakness classification (CWE)

CWE-416 — Use After Free

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)

Frequently asked questions

What is CVE-2026-45989?: CVE-2026-45989 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-27.
How severe is CVE-2026-45989?: High severity. CVSS v3 base score is 7.8 out of 10.