CVE-2026-90214 ASoC: xilinx: formatter_pcm: fix stream_data leak on open error
A use-after-free vulnerability in the Linux kernel's Xilinx formatter PCM driver allows local attackers to execute arbitrary code or cause a denial of service via a specific error path during stream opening.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90214?
CVE-2026-90214 is an use after free vulnerability in Linux, published on 17 Sep 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: xilinx: formatter_pcm: fix stream_data leak on open error
In xlnx_formatter_pcm_open(), stream_data is allocated and adata->play_stream or adata->capture_stream is assigned early. If a later step, such as snd_pcm_hw_constraint_step() or snd_pcm_hw_constraint_integer(), fails, the function returns the error immediately. ALSA does not call the close callback when open fails, so stream_data is leaked and the stream pointer is left dangling, pointing to a substream that ALSA frees. A later interrupt would then call snd_pcm_period_elapsed() on the freed substream.
Free stream_data and clear the stream pointer on the error paths.
Which versions are affected by CVE-2026-90214?
How do I fix CVE-2026-90214?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-90214 being exploited?
There is no known exploitation of CVE-2026-90214 in the wild and no public exploit code.
Sources
Also known as AZL-102305, BELL-CVE-2026-90214, DEBIAN-CVE-2026-90214, GHSA-2gxq-r2mx-5g9g, UBUNTU-CVE-2026-90214.