CVE-2026-25068

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Source
https://cve.org/CVERecord?id=CVE-2026-25068
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25068.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25068
Downstream
Published
2026-01-29T19:08:03.986Z
Modified
2026-08-07T21:09:19.495599Z
Severity
  • 4.6 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
alsa-lib 1.2.15.2 Topology Decoder Heap-based Buffer Overflow
Details

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 tplgdecodecontrolmixer1() function reads the numchannels field from untrusted .tplg data and uses it as a loop bound without validating it against the fixed-size channel array (SNDTPLGMAXCHAN). A crafted topology file with an excessive numchannels value can cause out-of-bounds heap writes, leading to a crash.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25068.json",
    "cwe_ids": [
        "CWE-129"
    ]
}
References

Affected packages

Git / github.com/alsa-project/alsa-lib

Affected ranges

Type
GIT
Repo
https://github.com/alsa-project/alsa-lib
Events
Introduced
717a8425ff13bac20c94796ca726f5222480f7d5
Fixed
5f7fe33002d2d98d84f72e381ec2cccc0d5d3d40
Database specific 
{
    "extracted_events": [
        {
            "introduced": "1.2.2"
        },
        {
            "last_affected": "1.2.15.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.2.10
v1.2.11
v1.2.12
v1.2.13
v1.2.14
v1.2.15
v1.2.15.1
v1.2.15.2
v1.2.15.3
v1.2.2
v1.2.3
v1.2.3.1
v1.2.3.2
v1.2.4
v1.2.5
v1.2.6
v1.2.6.1
v1.2.7
v1.2.7.1
v1.2.7.2
v1.2.8
v1.2.9

Database specific

vanir_signatures 
[
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "40889492823950341381219997890138818637",
                "215537673880048521820366870348777685505",
                "319064719151019657717276530282089549044",
                "301499185625432265915833169725067162728"
            ]
        },
        "id": "CVE-2026-25068-04f3a047",
        "signature_type": "Line",
        "source": "https://github.com/alsa-project/alsa-lib/commit/5f7fe33002d2d98d84f72e381ec2cccc0d5d3d40",
        "target": {
            "file": "src/topology/ctl.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "length": 2444.0,
            "function_hash": "207084074088684355095339922975343511881"
        },
        "id": "CVE-2026-25068-0cbbd58c",
        "signature_type": "Function",
        "source": "https://github.com/alsa-project/alsa-lib/commit/5f7fe33002d2d98d84f72e381ec2cccc0d5d3d40",
        "target": {
            "function": "tplg_decode_control_mixer1",
            "file": "src/topology/ctl.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-07T21:09:19Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25068.json"