SB20261023227 - Memory leak in Linux kernel vmw_vsock

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-98947)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

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 exhaust kernel memory and potentially cause a denial of service.

The vulnerability exists due to a memory leak in the Linux kernel VMCI vsock datagram transport when receiving datagrams during socket closure. A local user can trigger datagram reception concurrently with socket closure to cause packet buffers to be moved from the socket backlog into an already-cleared receive queue, leaving them allocated and potentially exhausting kernel memory.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0f8e2b2045355a0ee2008125e573435504b13cee
• https://git.kernel.org/stable/c/4835dbcde5cc3ae37e0d0796052056b35fcae8bf
• https://git.kernel.org/stable/c/7c24a4e87e219072e5e106f6791146cbf3b056b3
• https://git.kernel.org/stable/c/9907db2b8e7ba70b442bb9dec86526a6511fac62