SB2026102966 - Race condition in Linux kernel vmw_vsock

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-99213)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service through kernel memory corruption.

The vulnerability exists due to a race condition in the Linux kernel vsock_connect() function when handling an OP_RST transition from TCP_ESTABLISHED to TCP_CLOSING during connection establishment. A local user can trigger this race to reset a socket still present in connected_table, causing kernel memory corruption and crashes when the socket is reinserted.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/44d1ca05d6094a5d75c671a0545249186d790b8d
• https://git.kernel.org/stable/c/4f6ac74fa594a918d41255c941256e1d51592d3b
• https://git.kernel.org/stable/c/c2c5359ef2c33684fa3f3652fd761a483db8d1e7