CVE-2025-40231 — Improper Locking in Linux

CWE-667 — Improper Locking54 documents6 sources
Severity
7.8HIGHOSV
OSV5.5OSV3.2
No vector
EPSS
0.1%
top 79.07%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedDec 4
Latest updateApr 13

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: fix lock inversion in vsock_assign_transport() Syzbot reported a potential lock inversion deadlock between vsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called. The issue was introduced by commit 687aa0c5581b ("vsock: Fix transport_* TOCTOU") which added vsock_register_mutex locking in vsock_assign_transport() around the transport->release() call, that can call vsock_linger(). vsock_assign_transport(…

Affected Packages5 packages

▶Linuxlinux/linux_kernel5.11.0 — 5.15.196+5
▶Debianlinux/linux_kernel< 5.10.247-1+3
▶Ubuntulinux/linux_kernel< 5.15.0-170.180+2
▶CVEListV5linux/linux8667e8d0eb46bc54fdae30ba2f4786407d3d88eb — ce4f856c64f0bc30e29302a0ce41f4295ca391c5+8
▶debiandebian/linux< linux 6.1.158-1 (bookworm)

🔴Vulnerability Details

27
OSV
linux-raspi vulnerabilities↗2026-04-01
▶
OSV
linux-raspi, linux-raspi-realtime vulnerabilities↗2026-04-01
▶
OSV
linux-azure-6.8 vulnerabilities↗2026-03-25
▶
OSV
linux-azure vulnerabilities↗2026-03-25
▶
OSV
linux-aws-6.8 vulnerabilities↗2026-03-23
▶

📋Vendor Advisories

26
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-04-13
▶
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2026-04-09
▶
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2026-04-09
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-04-01
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-04-01
▶