CVE-2026-43204 ASoC: qcom: q6asm: drop DSP responses for closed data streams
A flaw in the Linux kernel's Qualcomm audio driver causes system lockups when handling DSP responses for closed streams, requiring a patch to prevent denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43204?
CVE-2026-43204 is a medium-severity denial of service vulnerability in Linux kernel, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ASoC: qcom: q6asm: drop DSP responses for closed data streams
'Commit a354f030dbce ("ASoC: qcom: q6asm: handle the responses after closing")' attempted to ignore DSP responses arriving after a stream had been closed.
However, those responses were still handled, causing lockups.
Fix this by unconditionally dropping all DSP responses associated with closed data streams.
Which versions are affected by CVE-2026-43204?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43204?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-43204 being exploited?
There is no known exploitation of CVE-2026-43204 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43204, DEBIAN-CVE-2026-43204, GHSA-c79v-q7h2-4c95, ROOT-OS-DEBIAN-11-CVE-2026-43204, ROOT-OS-DEBIAN-12-CVE-2026-43204, ROOT-OS-DEBIAN-13-CVE-2026-43204 and 3 more.