# CVE-2026-90781: alsa-lib through 1.2.16.1 Off-by-One Stack Buffer Overflow in __snd_ctl_ascii_elem_id_parse()

CVE-2026-90781 is fixed in alsa-lib on 1 platform by DEBIAN-CVE-2026-90781 (version 1.2.16.1-2), released October 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90781
- Priority: Routine
- CVSS: 4.4 (Moderate)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2026
- Weakness: Off-by-one Error
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90781

## Description

alsa-lib through 1.2.16.1 contains a stack buffer overflow in the __snd_ctl_ascii_elem_id_parse() function that writes one byte past a 64-byte buffer when parsing a name= field with 64 or more characters. Attackers can supply a long control-element identifier string through saved state files or command-line arguments to overwrite adjacent stack memory and crash the calling process.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | alsa-lib Debian 14 | 1.2.16.1-2 | [DEBIAN-CVE-2026-90781](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90781.md) | Oct 6, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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