CVE-2026-74295 ASoC: codecs: hdac_hdmi: Validate written enum value
An out-of-bounds read in the Linux kernel HDMI audio driver allows attackers to read memory or crash the system via invalid enum values.
- 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-2026-74295?
CVE-2026-74295 is a high-severity memory corruption vulnerability in Linux, published on 15 Aug 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: codecs: hdac_hdmi: Validate written enum value
hdac_hdmi_set_pin_port_mux() uses the written enum value to index the texts array before calling snd_soc_dapm_put_enum_double(), which validates that the value is within the enum item range.
An out-of-range value can therefore make the driver read past the texts array before the helper rejects the write. Move the lookup after the helper has accepted the value.
Which versions are affected by CVE-2026-74295?
How do I fix CVE-2026-74295?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74295 being exploited?
There is no known exploitation of CVE-2026-74295 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74295, DEBIAN-CVE-2026-74295, GHSA-gpjf-6x9p-w663, UBUNTU-CVE-2026-74295.