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
| Release | Package | Fixed 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
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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
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-25068.html