Race condition in Linux kernel - CVE-2026-99213
Published: October 29, 2026
Vulnerability identifier: #VU158372
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-99213
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99213
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2