CVE-2026-80761

A flaw was found in the Linux kernel's Bluetooth ISO subsystem. The iso_sock_getname() function fails to properly initialize the sockaddr_iso structure before returning it. This oversight allows an unprivileged attacker to read uninitialized kernel stack memory, leading to information disclosure. Depending on the connection type, this could expose sensitive data from the kernel.

This vulnerability is assessed as having a Moderate impact for Red Hat Enterprise Linux because exploitation requires local access with unprivileged socket creation capabilities, and the issue is confined to leaking small fragments of kernel stack memory rather than allowing privilege escalation or system crashes. Standard enterprise server deployments rarely enable or expose Bluetooth subsystems, which substantially limits real-world exposure. Furthermore, earlier releases such as Red Hat Enterprise Linux 8 do not incorporate the vulnerable isochronous socket code and remain unaffected.

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 for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.