CVE-2024-26610

What it actually does

Out-of-bounds write in iwlwifi driver due to byte offset arithmetic on a __le32 pointer (iwl_fw_ini_trigger_tlv::data), causing memory corruption when firmware INI trigger TLV data is copied.

Why it matters to the business

Linux systems with Intel WiFi hardware may experience kernel instability, crashes, or unexpected behavior in wireless networking until kernels are updated; widespread in Debian and upstream distributions but low active exploitation risk.

How an attack unfolds

An attacker with ability to influence firmware initialization paths (typically local or through crafted wireless frames) triggers the TLV data copy with an offset calculated in bytes rather than element size, writing past the buffer boundary.

How to fix it

Upgrade to fixed versions: Debian 12 and 13 to linux 6.1.7-1 or newer; apply upstream commit 05dd9facfb9a1e056752c0901c6e86416037d15a in the Linux kernel git tree.

How to confirm the fix worked

Verify running kernel version contains the fix commit or is at/above 6.1.7-1 on Debian; inspect dmesg or kernel logs for absence of prior iwlwifi memory corruption warnings after update.

Typical attack path

1. Identify systems running vulnerable iwlwifi kernels prior to the listed fixes
2. Trigger firmware INI trigger TLV allocation and copy path
3. Supply an offset value that exceeds the allocated buffer when treated as byte offset on __le32 pointer
4. Achieve memory corruption leading to crash or potential further exploitation

How to detect it

Examine kernel logs and dmesg for iwlwifi-related oops, warnings about buffer overruns, or firmware TLV handling errors on systems that may have run vulnerable versions.

What your security team should do

• Prioritize kernel package updates on all affected Debian and upstream Linux systems
• Reboot systems after kernel upgrades to load fixed iwlwifi module
• Review wireless hardware support policies for continued use of older kernels