CVE-2024-41028

What it actually does

Missing terminating empty entry in toshiba_dmi_quirks[] causes out-of-bounds array access during DMI quirk list processing in the toshiba_acpi driver.

Why it matters to the business

Systems using affected Linux kernels on Toshiba hardware risk kernel instability or memory corruption during boot or module initialization, increasing downtime and potential data loss on enterprise and embedded deployments; prevalence across stable kernel trees heightens exposure for organizations running downstream distributions.

How an attack unfolds

An attacker with local access or the ability to influence DMI table processing on a Toshiba system triggers the unterminated quirk array walk, resulting in out-of-bounds reads or writes that may be leveraged for privilege escalation or denial of service; listed threat actors in espionage and financial campaigns have shown interest in similar Linux kernel memory issues.

How to fix it

Upgrade to the fixed commit e030aa6c972641cb069086a8c7a0f747653e472a in the Linux kernel stable tree; rebuild and deploy updated kernel packages containing the terminating empty entry for toshiba_dmi_quirks[].

How to confirm the fix worked

Confirm the patch by verifying presence of the terminating empty DMI entry in toshiba_acpi.c and test that DMI quirk processing completes without out-of-bounds warnings in kernel logs on Toshiba hardware.

Typical attack path

1. Identify or gain local execution on a target running an affected Toshiba-acpi enabled kernel
2. Trigger DMI matching code path during driver initialization or hardware probe
3. Cause the kernel to walk past the end of the unterminated quirks array
4. Exploit resulting out-of-bounds access for memory corruption or crash

How to detect it

Review kernel boot logs and dmesg for array access warnings or oops messages originating from toshiba_acpi during DMI quirk processing; correlate with system startup on Toshiba hardware.

What your security team should do

• Prioritize kernel updates to the referenced fixed commit on all Toshiba Linux systems within the next maintenance window
• Monitor kernel changelogs and distribution advisories for backports of e030aa6c972641cb069086a8c7a0f747653e472a
• Restrict local access on exposed systems until patched