CVE-2025-71126 — Improper Locking in Linux
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 97.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 14
Latest updateApr 17
Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: avoid deadlock on fallback while reinjecting
Jakub reported an MPTCP deadlock at fallback time:
WARNING: possible recursive locking detected
6.18.0-rc7-virtme #1 Not tainted
mptcp_connect/20858 is trying to acquire lock:
ff1100001da18b60 (&msk->fallback_lock){+.-.}-{3:3}, at: __mptcp_try_fallback+0xd8/0x280
but task is already holding lock:
ff1100001da18b60 (&msk->fallback_lock){+.-.}-{3:3}, at: __mptcp_retrans+0x352/…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages16 packages
Patches
🔴Vulnerability Details
3OSV▶
CVE-2025-71126: In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid deadlock on fallback while reinjecting Jakub reported an MPTCP deadlo↗2026-01-14
GHSA▶
GHSA-cqcj-p3px-rprf: In the Linux kernel, the following vulnerability has been resolved:
mptcp: avoid deadlock on fallback while reinjecting
Jakub reported an MPTCP dead↗2026-01-14