CVE-2026-25068

alsa-lib versions 1.2.2 up to and including 1.2.15.2, prior to commit 5f7fe33, contain a heap-based buffer overflow in the topology mixer control decoder. The tplg_decode_control_mixer1() function reads the num_channels field from untrusted .tplg data and uses it as a loop bound without validating it against the fixed-size channel array (SND_TPLG_MAX_CHAN). A crafted topology file with an excessive num_channels value can cause out-of-bounds heap writes, leading to a crash.

CVSS

No CVSS.

References

Link	Resource
https://github.com/alsa-project/alsa-lib/commit/5f7fe33002d2d98d84f72e381ec2cccc0d5d3d40
https://www.vulncheck.com/advisories/alsa-lib-topology-decoder-heap-based-buffer-overflow
https://lists.debian.org/debian-lts-announce/2026/02/msg00008.html

Configurations

No configuration.

History

15 Apr 2026, 00:35

Type	Values Removed	Values Added
Summary		(es) Las versiones de alsa-lib 1.2.2 hasta la 1.2.15.2 inclusive, anteriores al commit 5f7fe33, contienen un desbordamiento de búfer basado en montículo en el decodificador de control del mezclador de topología. La función tplg_decode_control_mixer1() lee el campo num_channels de datos .tplg no confiables y lo utiliza como límite de bucle sin validarlo contra el array de canales de tamaño fijo (SND_TPLG_MAX_CHAN). Un archivo de topología manipulado con un valor excesivo de num_channels puede causar escrituras fuera de límites en el montículo, lo que lleva a un fallo.

06 Feb 2026, 01:15

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2026/02/msg00008.html -

29 Jan 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-29 20:16

Updated : 2026-04-15 00:35

NVD link : CVE-2026-25068

Mitre link : CVE-2026-25068

CVE.ORG link : CVE-2026-25068

JSON object : View

Products Affected

No product.

CWE

CWE-129

Improper Validation of Array Index

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