CVE-2026-90068 ASoC: dapm: Fix off-by-one check on the second enum channel
An off-by-one error in the Linux kernel ASoC DAPM enum handler allows local attackers to read out-of-bounds memory or cause a crash.
- 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-2026-90068?
CVE-2026-90068 is a 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: dapm: Fix off-by-one check on the second enum channel
The snd_soc_dapm_put_enum_double() rejects item[0] once it reaches e->items, but it lets item[1] be equal to it. Both go on to snd_soc_enum_item_to_val(), which indexes e->values with no bound of its own, so an enum with a value table reads one element past the end.
The indexing arrived with the MUX consolidation, which relaxed the item[1] check in the same hunk. The value MUX handler it deleted used >= there, and the snd_soc_put_enum_double() in soc-ops.c still does.
Only adav80x pairs a value table with two shifts, and its second channel looks accidental, but the control does report two values. Writing three into it reads off the end of adav80x_mux_values. The core catches that only under CONFIG_SND_CTL_INPUT_VALIDATION, which defaults off.
Which versions are affected by CVE-2026-90068?
How do I fix CVE-2026-90068?
Apply the vendor's patch.
Is CVE-2026-90068 being exploited?
There is no known exploitation of CVE-2026-90068 in the wild and no public exploit code.
Sources
Also known as AZL-101984, BELL-CVE-2026-90068, DEBIAN-CVE-2026-90068, GHSA-gx3g-862r-xxh6, UBUNTU-CVE-2026-90068.