What is CVE-2026-43187?

CVE-2026-43187 is a high-severity vulnerability in Linux, classified under Integer Underflow. CVSS score: 8.8/10. Published 2026-05-06.

How severe is CVE-2026-43187?

High severity. CVSS v3 base score is 8.8 out of 10.

Integer overflow in Linux

CVE-2026-43187

In the Linux kernel, the following vulnerability has been resolved: xfs: delete attr leaf freemap entries when empty Back in commit 2a2b5932db6758 ("xfs: fix attr leaf header freemap.size underflow"), Brian Foster observed that it's poss…

EPSS: 0.001 (18.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 2.6.12, 0
Linux Linux_kernel — versions 2.6.12

Weakness classification (CWE)

CWE-191 — Integer Underflow

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

Frequently asked questions

What is CVE-2026-43187?: CVE-2026-43187 is a high-severity vulnerability in Linux, classified under Integer Underflow. CVSS score: 8.8/10. Published 2026-05-06.
How severe is CVE-2026-43187?: High severity. CVSS v3 base score is 8.8 out of 10.