CVE-2024-26722: ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()
In the Linux kernel, the following vulnerability has been resolved:
ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()
There is a path in rt5645_jack_detect_work(), where rt5645->jd_mutex
is left locked forever. That may lead to deadlock
when rt5645_jack_detect_work() is called for the second time.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Security readout for executives and security teams
Plain-English summary
CVE-2024-26722 is a Linux kernel driver bug in the Realtek RT5645 audio codec path. A mutex can remain locked after jack detection work runs, causing a later detection attempt to deadlock. The known business impact is availability or reliability disruption on systems using this driver, not confirmed data theft or remote compromise.
Executive priority
Treat as a targeted kernel availability issue. It should be handled through normal kernel patch management, with higher priority for devices where audio hardware reliability affects operations or where embedded Linux images are slow to update.
Technical view
The issue is in rt5645_jack_detect_work() in the Linux ASoC rt5645 driver. A control path leaves rt5645->jd_mutex locked, so a second call can deadlock. Linux stable commits are cited as the resolution. The source bundle provides no CVSS, CWE, exploit details, or complete downstream product mapping.
Likely exposure
Exposure appears limited to Linux systems running affected kernel builds with the rt5645 ASoC driver relevant to their hardware. The bundle lists Linux versions and stable commits, but exact affected-versus-fixed range interpretation is incomplete and should be validated against the running distribution kernel.
Exploitation context
The source bundle does not indicate active exploitation, and KEV is false. The issue appears to require the vulnerable driver path to run, likely tied to local hardware or kernel event handling. No remote attack path is described in the provided evidence.
Researcher notes
Evidence supports a mutex-locking defect fixed upstream. There is no CVSS, CWE, proof of exploitation, or weaponized detail in the bundle. The affected version data appears non-obvious, so researchers should rely on upstream stable commits and distribution advisories for precise status.
Mitigation direction
Update to a kernel containing the cited Linux stable fix commits.
Check Debian LTS advisories if using Debian-packaged kernels.
Prioritize affected endpoint, embedded, or appliance fleets using RT5645 audio hardware.
If no vendor package is available, monitor vendor kernel guidance before changing kernels manually.
Validation and detection
Inventory running kernel versions across Linux assets.
Check whether the rt5645 ASoC driver is present or loaded.
Map distribution kernel packages to the cited stable fixes or vendor advisories.
Review system logs for recurring audio jack detection or driver deadlock symptoms.
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-2024-26722 mapping review
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