CVE-2024-27056: wifi: iwlwifi: mvm: ensure offloading TID queue exists
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: ensure offloading TID queue exists
The resume code path assumes that the TX queue for the offloading TID
has been configured. At resume time it then tries to sync the write
pointer as it may have been updated by the firmware.
In the unusual event that no packets have been send on TID 0, the queue
will not have been allocated and this causes a crash. Fix this by
ensuring the queue exist at suspend time.
Security readout for executives and security teams
Plain-English summary
CVE-2024-27056 is a Linux kernel Wi-Fi driver crash bug. During resume from suspend, iwlwifi may assume a transmit queue exists when it was never created. The described impact is a kernel crash, not data theft or remote code execution in the provided sources.
Executive priority
Handle through normal kernel patch governance, with higher priority for managed laptops and products where Wi-Fi suspend/resume crashes affect availability or support commitments. No source evidence supports emergency response for active exploitation.
Technical view
The iwlwifi mvm resume path syncs the write pointer for the offloading TID queue. If no packets were sent on TID 0, that queue may not exist, causing a crash. The kernel fix ensures the queue exists at suspend time.
Likely exposure
Systems are likely exposed only if they run affected Linux kernel builds with Intel iwlwifi mvm wireless hardware and use suspend/resume behavior. Servers without this driver or Wi-Fi path are unlikely to be affected.
Exploitation context
The bundle does not cite active exploitation, KEV listing, exploit publication, or remote attack conditions. The trigger depends on an unusual queue state around suspend/resume, so treat this primarily as availability risk until vendor advisories say more.
Researcher notes
The public description is narrow: an unallocated offloading TID TX queue in iwlwifi mvm resume handling. The bundle lacks CVSS, CWE, exploitability analysis, and exact fixed package versions beyond kernel stable commits and downstream advisories.
Mitigation direction
Update to a kernel containing the referenced stable fixes.
Apply applicable distribution or vendor advisories, including Debian or Siemens guidance where relevant.
Prioritize laptops, embedded systems, and appliances using Intel iwlwifi wireless hardware.
If patching is delayed, review vendor guidance for operational workarounds.
Validation and detection
Inventory Linux kernel versions on systems with Intel Wi-Fi adapters.
Check whether the iwlwifi mvm driver is present and in use.
Confirm installed kernels include the referenced stable commits or vendor-fixed packages.
Review crash logs for suspend/resume failures involving iwlwifi queues.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2024-27056 mapping review
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