What is CVE-2026-43029?

CVE-2026-43029 is a high-severity vulnerability in Linux, classified under Improper Locking. CVSS score: 7.5/10. Published 2026-05-01.

How severe is CVE-2026-43029?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Linux

CVE-2026-43029

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lockup in mptcp_recvmsg() syzbot reported a soft lockup in mptcp_recvmsg() [0]. When receiving data with MSG_PEEK | MSG_WAITALL flags, the skb is not re…

EPSS: 0.000 (15.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 0206a9341e652167c610dcd79f3d4e9e8153984c, 7.0, 6.12.59
Linux Linux_kernel — versions 6.6.117, 6.12.59, 6.17.8

Weakness classification (CWE)

CWE-667 — Improper Locking

References

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

Frequently asked questions

What is CVE-2026-43029?: CVE-2026-43029 is a high-severity vulnerability in Linux, classified under Improper Locking. CVSS score: 7.5/10. Published 2026-05-01.
How severe is CVE-2026-43029?: High severity. CVSS v3 base score is 7.5 out of 10.