What is CVE-2026-43258?

CVE-2026-43258 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-05-06.

How severe is CVE-2026-43258?

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

Buffer overflow in Linux

CVE-2026-43258

In the Linux kernel, the following vulnerability has been resolved: alpha: fix user-space corruption during memory compaction Alpha systems can suffer sporadic user-space crashes and heap corruption when memory compaction is enabled. Sy…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (2.4th 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 a48d07afdf18212de22b959715b16793c5a6e57a, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 7.0
Linux Linux_kernel — versions 2.6.16

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

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)

Frequently asked questions

What is CVE-2026-43258?: CVE-2026-43258 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-05-06.
How severe is CVE-2026-43258?: High severity. CVSS v3 base score is 7.8 out of 10.