CVE-2026-99122
kernel: kernel: Denial of Service via unvalidated packet source in VMCI sockets
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 28, 2026
Updated · November 1, 2026
Description
A flaw was found in the Linux kernel. This flaw allows a Denial of Service (DoS) due to missing source validation in the Virtual Machine Communication Interface (VMCI) socket implementation. When handling incoming stream packets, the kernel can assign traffic to a connected socket without verifying that it originated from the expected peer. An attacker in a separate VMCI context can exploit this issue by sending reset packets to prematurely terminate active socket connections.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.3CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-346 · Origin Validation Error