CVE-2025-38618

vsock: Do not allow binding to VMADDR_PORT_ANY

State: Published
Severity: 7.8 High
Published: Aug 22, 2025
Updated: Aug 5, 2026
Reserved: Apr 16, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d021c344051af91f42c5ba9fdedc176740cbd238 to before c04a2c1ca25b9b23104124d3b2d349d934e302deAffected d021c344051af91f42c5ba9fdedc176740cbd238 to before d1a5b1964cef42727668ac0d8532dae4f8c19386Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before cf86704798c1b9c46fa59dfc2d662f57d1394d79Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before f138be5d7f301fddad4e65ec66dfc3ceebf79be3Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 44bd006d5c93f6a8f28b106cbae2428c5d0275b7Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 32950b1907919be86a7a2697d6f93d57068b3865Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 8f01093646b49f6330bb2d36761983fd829472b1Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before d73960f0cf03ef1dc9e96ec7a20e538accc26d87Affected d021c344051af91f42c5ba9fdedc176740cbd238 to before aba0c94f61ec05315fa7815d21aefa4c87f6a9f4Affected
LinuxLinux	3.9Affected before 3.9Not affected 5.4.297 through 5.4.Not affected 5.10.241 through 5.10.Not affected 5.15.190 through 5.15.Not affected 6.1.148 through 6.1.Not affected 6.6.102 through 6.6.Not affected 6.12.42 through 6.12.Not affected 6.15.10 through 6.15.Not affected 6.16.1 through 6.16.Not affected 6.17 and laterNot affected

Product

Versions

LinuxLinux

d021c344051af91f42c5ba9fdedc176740cbd238 to before c04a2c1ca25b9b23104124d3b2d349d934e302deAffected
d021c344051af91f42c5ba9fdedc176740cbd238 to before d1a5b1964cef42727668ac0d8532dae4f8c19386Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before cf86704798c1b9c46fa59dfc2d662f57d1394d79Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before f138be5d7f301fddad4e65ec66dfc3ceebf79be3Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before 44bd006d5c93f6a8f28b106cbae2428c5d0275b7Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before 32950b1907919be86a7a2697d6f93d57068b3865Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before 8f01093646b49f6330bb2d36761983fd829472b1Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before d73960f0cf03ef1dc9e96ec7a20e538accc26d87Affected
d021c344051af91f42c5ba9fdedc176740cbd238 to before aba0c94f61ec05315fa7815d21aefa4c87f6a9f4Affected

LinuxLinux

3.9Affected
before 3.9Not affected
5.4.297 through 5.4.*Not affected
5.10.241 through 5.10.*Not affected
5.15.190 through 5.15.*Not affected
6.1.148 through 6.1.*Not affected
6.6.102 through 6.6.*Not affected
6.12.42 through 6.12.*Not affected
6.15.10 through 6.15.*Not affected
6.16.1 through 6.16.*Not affected
6.17 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.