---
id: CVE-2026-80966
title: 'ALSA: portman2x4: Check card index validity at probe'
summary: |-
  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…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-125
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    45ea0707298798678a60ff861b695aea049a5469
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    5d7ac5e9ee5ba76b567ace13b46075caf79dcca0
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    0048994854f3e9c57b7a754de43ef8da5818d140
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    64898e9bd8b7b229efa8642b85b56b326a6ec3dc
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    0ce391090809d610647f424b9b1dc24aa2c546fd
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    e1ce8ad1009b1736b3044b3324350dcfdd516f42
  - >-
    Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 <
    3690ef20469d5959378260e2752f2314a2572913
  - Linux 2.6.21
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:45:50.251Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80966'
references:
  - url: 'https://git.kernel.org/stable/c/45ea0707298798678a60ff861b695aea049a5469'
  - url: 'https://git.kernel.org/stable/c/5d7ac5e9ee5ba76b567ace13b46075caf79dcca0'
  - url: 'https://git.kernel.org/stable/c/0048994854f3e9c57b7a754de43ef8da5818d140'
  - url: 'https://git.kernel.org/stable/c/64898e9bd8b7b229efa8642b85b56b326a6ec3dc'
  - url: 'https://git.kernel.org/stable/c/0ce391090809d610647f424b9b1dc24aa2c546fd'
  - url: 'https://git.kernel.org/stable/c/d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8'
  - url: 'https://git.kernel.org/stable/c/e1ce8ad1009b1736b3044b3324350dcfdd516f42'
  - url: 'https://git.kernel.org/stable/c/3690ef20469d5959378260e2752f2314a2572913'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80966.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80966'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532285'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80966'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80966'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80966.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00216
epssPercentile: 0.11983
ingestedAt: '2026-09-14T15:23:07.455Z'
---

## Overview

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

- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 45ea0707298798678a60ff861b695aea049a5469`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 5d7ac5e9ee5ba76b567ace13b46075caf79dcca0`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 0048994854f3e9c57b7a754de43ef8da5818d140`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 64898e9bd8b7b229efa8642b85b56b326a6ec3dc`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 0ce391090809d610647f424b9b1dc24aa2c546fd`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < e1ce8ad1009b1736b3044b3324350dcfdd516f42`
- `Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 3690ef20469d5959378260e2752f2314a2572913`
- `Linux 2.6.21`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80966.json)