What is CVE-2026-43040?

CVE-2026-43040 is a high-severity vulnerability in Linux, classified under CWE-909. CVSS score: 7.1/10. Published 2026-05-01.

How severe is CVE-2026-43040?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Linux

CVE-2026-43040

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak When processing Router Advertisements with user options the ke…

EPSS: 0.000 (3.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions 31910575a9de61e78065e93846e8e7a4894a18bf, 2.6.24, 0
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-909

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-2026-43040?: CVE-2026-43040 is a high-severity vulnerability in Linux, classified under CWE-909. CVSS score: 7.1/10. Published 2026-05-01.
How severe is CVE-2026-43040?: High severity. CVSS v3 base score is 7.1 out of 10.