---
cve: "CVE-2026-90781"
severity: "MEDIUM"
cvss: 4.8
epss: "18%"
vendor: "ALSA Project"
kev: false
exploited: false
published: "2026-09-13 13:16:29"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T01:07:59+02:00"
---

# CVE-2026-90781

> 4.8 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a7babcb8e6361719bf18fa96f11354d125447500 (Commit)
- f84cd4ced7b36fddb8e4ee24404cf7c091d27020 (Commit)

## Referenzen

- <https://github.com/alsa-project/alsa-lib/commit/f84cd4ced7b36fddb8e4ee24404cf7c091d27020>
- <https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/control/ctlparse.c#L216-L241>
- <https://lore.kernel.org/alsa-devel/CACBQ=P2FhO3M6dkv3cWuKb6Qhs92ouV+FJ3SJZ_PVBSSdJWRAQ@mail.gmail.com/>
- <https://github.com/alsa-project/alsa-lib>
- <https://www.vulncheck.com/advisories/alsa-lib-through-1.2.16.1-off-by-one-stack-buffer-overflow-in-snd-ctl-ascii-elem-id-parse>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-90781) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_