CVE-2025-38618

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < c04a2c1ca25b9b23104124d3b2d349d934e302deaffected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < d1a5b1964cef42727668ac0d8532dae4f8c19386affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < cf86704798c1b9c46fa59dfc2d662f57d1394d79affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < f138be5d7f301fddad4e65ec66dfc3ceebf79be3affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < 44bd006d5c93f6a8f28b106cbae2428c5d0275b7affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < 32950b1907919be86a7a2697d6f93d57068b3865affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < 8f01093646b49f6330bb2d36761983fd829472b1affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < d73960f0cf03ef1dc9e96ec7a20e538accc26d87affected
LinuxLinuxd021c344051af91f42c5ba9fdedc176740cbd238 < aba0c94f61ec05315fa7815d21aefa4c87f6a9f4affected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux5.4.297 <= 5.4.*unaffected
LinuxLinux5.10.241 <= 5.10.*unaffected
LinuxLinux5.15.190 <= 5.15.*unaffected
LinuxLinux6.1.148 <= 6.1.*unaffected
LinuxLinux6.6.102 <= 6.6.*unaffected
LinuxLinux6.12.42 <= 6.12.*unaffected
LinuxLinux6.15.10 <= 6.15.*unaffected
LinuxLinux6.16.1 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References