CVE-2026-52947

A flaw was found in the Linux kernel's qrtr network subsystem. A race condition exists in the qrtr_port_remove() function where the socket reference count is decremented prematurely. This allows a concurrent reader to access a socket whose reference count has dropped to zero, potentially leading to a Use-After-Free (UAF) vulnerability. An attacker could exploit this to cause memory corruption, leading to system instability or a denial of service.

Red Hat has evaluated this vulnerability as having a Moderate severity impact because exploitation requires local access and precise timing to trigger a race condition during Qualcomm IPC Router (QRTR) socket teardown. Although a successful exploit may lead to kernel memory corruption or system instability, the vulnerable QRTR protocol is specific to Qualcomm inter-processor communication and is typically not active in standard enterprise server environments. Furthermore, unprivileged users do not interact with this subsystem under typical deployment configurations.

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.