CVE-2024-53161

In the Linux kernel, the following vulnerability has been resolved:

EDAC/bluefield: Fix potential integer overflow

The 64-bit argument for the "get DIMM info" SMC call consists of mem_ctrl_idx left-shifted 16 bits and OR-ed with DIMM index. With mem_ctrl_idx defined as 32-bits wide the left-shift operation truncates the upper 16 bits of information during the calculation of the SMC argument.

The mem_ctrl_idx stack variable must be defined as 64-bits wide to prevent any potential integer overflow, i.e. loss of data from upper 16 bits.

Actual only for latest version of Red Hat Enterprise Linux 8 and latest version of Red Hat Enterprise Linux 9 (where configuration parameter CONFIG_EDAC_BLUEFIELD enabled as module). For triggering this bug need physical access (kind of insert malicious DIMM of memory), because it can happen only during boot or after DIMM of memory updated. Could happen only if this type of memory being used: "Mellanox BlueField SoC". The security impact is limited.

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.

To mitigate this issue, prevent module bluefield_edac from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.