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CVE-2026-56109

Discovered by AISLEPUBLISHEDCWE-415

Description

The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.

CVSS Base Scores

CVSS v4.07.0

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

CVSS v3.1
6.8

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected Products

VendorProductVersionStatus
alsa-projectalsa-lib0affected

Credits

  • Dmitrijs Trizna of Aisle Research(finder)
  • Luigino Camastra of Aisle Research(finder)
  • Guido Vranken of Aisle Research(finder)
  • Ze Sheng of Aisle Research(finder)

References