What is CVE-2026-43303?

CVE-2026-43303 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-08.

How severe is CVE-2026-43303?

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

Use After Free in Linux

CVE-2026-43303

In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: clear page->private in free_pages_prepare() Several subsystems (slub, shmem, ttm, etc.) use page->private but don't clear it before freeing pages. When t…

Vulnerability class: Use-After-Free

EPSS: 0.000 (2.3th 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 3b8000ae185cb068adbda5f966a3835053c85fd4, 5.18, 0
Linux Linux_kernel — versions 5.18

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)

Frequently asked questions

What is CVE-2026-43303?: CVE-2026-43303 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-08.
How severe is CVE-2026-43303?: High severity. CVSS v3 base score is 7.8 out of 10.