CVE-2026-53255

A flaw was found in the Linux kernel's Bluetooth Management (MGMT) component. A remote attacker could exploit this by providing specially crafted advertising data, leading to an out-of-bounds read vulnerability. This occurs because the system incorrectly validates the length of advertising data fields before performing type checks, allowing a malformed field to cause a read beyond the allocated buffer. This issue could potentially result in a denial of service or information disclosure.

This vulnerability is rated as Moderate severity for Red Hat Enterprise Linux because exploitation requires local access to the kernel Bluetooth management socket rather than an over-the-air vector, limiting the maximum impact to a local denial of service via a kernel crash. Typical enterprise server environments do not deploy or activate Bluetooth controllers, substantially curtailing exposure across standard server profiles. Systems without active Bluetooth interfaces or those where Bluetooth subsystems remain unconfigured are not susceptible to this flaw.

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.