CVE-2025-38618

high

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: Do not allow binding to VMADDR_PORT_ANY It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can cause a use-after-free when a connection is made to the bound socket. The socket returned by accept() also has port VMADDR_PORT_ANY but is not on the list of unbound sockets. Binding it will result in an extra refcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep the binding until socket destruction). Modify the check in __vsock_bind_connectible() to also prevent binding to VMADDR_PORT_ANY.

References

https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3

https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87

https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386

https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79

https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de

https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4

https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1

https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7

https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865

Details

Source: Mitre, NVD

Published: 2025-08-22

Updated: 2025-08-28

Risk Information

CVSS v2

Base Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:C

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Severity: High

EPSS

EPSS: 0.00024