What’s Vulnerable › Vulnerabilities

CVE-2026-80966: ALSA: portman2x4: Check card index validity at probe

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: portman2x4: Check card index validity at probe Although portman2x4 driver has a check of the given devptr->id value, it doesn't check for a negative id, which is often given as "none" or such value when bound via sysfs. This may lead to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range.

Affected products

• Linux kernel: 2.6.21 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0048994854f3e9c57b7a754de43ef8da5818d140
• https://git.kernel.org/stable/c/0ce391090809d610647f424b9b1dc24aa2c546fd
• https://git.kernel.org/stable/c/3690ef20469d5959378260e2752f2314a2572913
• https://git.kernel.org/stable/c/45ea0707298798678a60ff861b695aea049a5469
• https://git.kernel.org/stable/c/5d7ac5e9ee5ba76b567ace13b46075caf79dcca0
• https://git.kernel.org/stable/c/64898e9bd8b7b229efa8642b85b56b326a6ec3dc
• https://git.kernel.org/stable/c/d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8
• https://git.kernel.org/stable/c/e1ce8ad1009b1736b3044b3324350dcfdd516f42

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