What is CVE-2026-43107?

CVE-2026-43107 is a medium-severity vulnerability in Linux, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.5/10. Published 2026-05-06.

How severe is CVE-2026-43107?

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

Vulnerability in Linux

CVE-2026-43107

In the Linux kernel, the following vulnerability has been resolved: xfrm: account XFRMA_IF_ID in aevent size calculation xfrm_get_ae() allocates the reply skb with xfrm_aevent_msgsize(), then build_aevent() appends attributes including X…

EPSS: 0.000 (2.1th 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 7e6526404adedf079279aa7aa11722deaca8fe2e, 4.19, 0
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

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-2026-43107?: CVE-2026-43107 is a medium-severity vulnerability in Linux, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.5/10. Published 2026-05-06.
How severe is CVE-2026-43107?: Medium severity. CVSS v3 base score is 5.5 out of 10.