System crash via unchecked firmware notification length
Published Jul 12, 2024 · Updated Aug 5, 2026
Out-of-bounds read in the Linux iwlwifi MVM driver allows adjacent attackers to crash affected systems via a crafted firmware notification. The MFUART assert-dump handler trusts the notification's data_size field when printing its buffer, so a claimed length can exceed the allocated payload. Exploitation requires an Intel Wi-Fi device to deliver a malicious MFUART assertion notification; the over-read can crash the host kernel.
Summary
What happened
Out-of-bounds read in the Linux iwlwifi MVM driver allows adjacent attackers to crash affected systems via a crafted firmware notification. The MFUART assert-dump handler trusts the notification's data_size field when printing its buffer, so a claimed length can exceed the allocated payload. Exploitation requires an Intel Wi-Fi device to deliver a malicious MFUART assertion notification; the over-read can crash the host kernel.
The record
- CVE
- CVE-2024-40941
- Published
- Jul 12, 2024
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 12, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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Published CVSS scores
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Attacks
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Technologies
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