Access of Uninitialized Pointer in Linux kernel - CVE-2026-99166
Published: October 29, 2026
Vulnerability identifier: #VU158410
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99166
CWE-ID: CWE-824
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing the Linux kernel.
The vulnerability exists due to an uninitialized pointer dereference in rds_rdma_cm_event_handler_cmn() when handling connection requests received on non-InfiniBand RDMA devices. A remote attacker can send a connection request to an RDS listener on an iWARP device to trigger a dereference of the uninitialized transport pointer and crash the kernel.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99166
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