What is CVE-2026-43139?

CVE-2026-43139 is a high-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 8.6/10. Published 2026-05-06.

How severe is CVE-2026-43139?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Linux

CVE-2026-43139

In the Linux kernel, the following vulnerability has been resolved: xfrm6: fix uninitialized saddr in xfrm6_get_saddr() xfrm6_get_saddr() does not check the return value of ipv6_dev_get_saddr(). When ipv6_dev_get_saddr() fails to find a…

EPSS: 0.001 (21.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Linux — versions a1e59abf824969554b90facd44a4ab16e265afa4, 2.6.19, 0
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

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-2026-43139?: CVE-2026-43139 is a high-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 8.6/10. Published 2026-05-06.
How severe is CVE-2026-43139?: High severity. CVSS v3 base score is 8.6 out of 10.