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Medium ALAS2023-2026-1426 1 CVE

Moderate: alsa-lib security update (Amazon Linux 2023)

Published Feb 16, 2026 · Updated Feb 18, 2026

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: 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.

Fixed packages 6

ReleasePackageFixed in
Amazon Linux · 2023 alsa-lib 0:1.2.7.2-1.amzn2023.0.3
Amazon Linux · 2023 alsa-lib-debuginfo 0:1.2.7.2-1.amzn2023.0.3
Amazon Linux · 2023 alsa-lib-debugsource 0:1.2.7.2-1.amzn2023.0.3
Amazon Linux · 2023 alsa-lib-devel 0:1.2.7.2-1.amzn2023.0.3
Amazon Linux · 2023 alsa-topology 0:1.2.7.2-1.amzn2023.0.3
Amazon Linux · 2023 alsa-ucm 0:1.2.7.2-1.amzn2023.0.3

Vulnerabilities 1

  • Medium 4.6

    alsa-lib 1.2.15.2 Topology Decoder Heap-based Buffer Overflow

    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 use…

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-25068.html