alsa-lib 1.2.15.2 Topology Decoder Heap-based Buffer Overflow_CVE-2026-25068

4.6 / 10

MEDIUM

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

Description

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.

Basic Information

ID CVE-2026-25068

Source VulnCheck

Published Jan 29, 2026 at 19:08

Affected Product

Vendor ALSA Project

Product alsa-lib

Version 1.2.2

Affected Versions ALSA Project alsa-lib 1.2.2

CWE Classification

CWE-129

References

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    "published": "2026-01-29T19:08:03.986Z",
    "modified": "2026-01-29T19:08:03.986Z",
    "type": "cve",
    "title": "alsa-lib 1.2.15.2 Topology Decoder Heap-based Buffer Overflow",
    "source": "VulnCheck",
    "references": "https://github.com/alsa-project/alsa-lib/commit/5f7fe33002d2d98d84f72e381ec2cccc0d5d3d40\nhttps://www.vulncheck.com/advisories/alsa-lib-topology-decoder-heap-based-buffer-overflow",
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