CVE-2026-24089: Improper Validation of Syntactic Correctness of Input in Kernel

Synopsis

Memory corruption vulnerability in the Qualcomm Snapdragon kernel fastboot command processor allows an attacker with physical access and privileged credentials to trigger invalid input handling and corrupt memory. The attacker must be physically present at the device and hold an admin-level account to send malformed fastboot commands. Successful exploitation gives the attacker full read access, write access, and the ability to crash or destabilize the affected system. HarborGuard tracks this advisory and will make a patched-image rebuild available the moment Qualcomm publishes a fix.

HarborGuard Coverage

Exploit Conditions

• Network reachabilityNot required

  The attacker requires direct physical access to the device; no network path to the target is needed.

• AuthenticationRequired

  A high-privilege (admin-level) account is required to issue fastboot commands; a standard user account is not sufficient.

• Victim interactionNot required

  No action from a victim user is needed; the attacker operates entirely without user participation.

• Attack complexityDetail

  Exploit conditions are straightforward and reliable once physical access and credentials are in hand, with no race conditions or environmental dependencies required.

Blast Radius

• Attacker reads sensitive data stored in memory, including credentials, keys, or protected system state.
• Attacker writes arbitrary data to memory, enabling modification of kernel structures or persistent firmware state.
• Attacker crashes or destabilizes the affected device, causing a full service disruption.
• The scope change (S:C) means impact can extend beyond the vulnerable component itself into other system resources or security boundaries.