CVE-2026-75146

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Source
https://cve.org/CVERecord?id=CVE-2026-75146
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-75146.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-75146
Downstream
CGA (38)
DEBIAN (1)
ECHO (1)
MGASA (1)
OESA (5)
openSUSE (5)
SUSE (2)
UBUNTU (1)
Related
openSUSE (5)
SUSE (2)
Published
2026-08-19T16:28:19Z
Modified
2026-09-30T08:16:43Z
Severity
  • 7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FFmpeg Out-of-Bounds Read in DASH Demuxer via dashdec.c
Details

FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75146.json"
}
References

Affected packages

Git / code.ffmpeg.org/FFmpeg/FFmpeg

Affected ranges

Type
GIT
Repo
https://code.ffmpeg.org/FFmpeg/FFmpeg
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
65b0dab903e5975e036b30ecc58f5935d4f151e0

Affected versions

Other
N
n0.*
n0.11-dev
n0.12-dev
n0.8
n1.*
n1.1-dev
n1.2-dev
n1.3-dev
n2.*
n2.0
n2.1-dev
n2.2-dev
n2.3-dev
n2.4-dev
n2.5-dev
n2.6-dev
n2.7-dev
n2.8-dev
n2.9-dev
n3.*
n3.1-dev
n3.2-dev
n3.3-dev
n3.4-dev
n3.5-dev
n4.*
n4.1-dev
n4.2-dev
n4.3-dev
n4.4-dev
n4.5-dev
n5.*
n5.1-dev
n5.2-dev
n6.*
n6.1-dev
n6.2-dev
n7.*
n7.1-dev
n7.2-dev
n8.*
n8.1-dev
n8.2-dev
n9.*
n9.1-dev

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-75146.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "307570546108117083969007297720946930034",
            "length": 535
        },
        "id": "CVE-2026-75146-08570d35",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://code.ffmpeg.org/FFmpeg/FFmpeg@65b0dab903e5975e036b30ecc58f5935d4f151e0",
        "target": {
            "file": "libavformat/dashdec.c",
            "function": "move_segments"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "312369478147089745414888542726523281367",
                "50427058296031127192295708817577645574",
                "43175266050272866375146862736790901369",
                "326112046778768842598715146398635712251",
                "125553747509471924331829218456209593164",
                "248606786996328159755046163842587150965",
                "11117762287937624563618178153849021753",
                "48139934443569739143388270718883943515",
                "110238175479310822534449300345287680574"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-75146-68124e6e",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://code.ffmpeg.org/FFmpeg/FFmpeg@65b0dab903e5975e036b30ecc58f5935d4f151e0",
        "target": {
            "file": "libavformat/dashdec.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "333738960995188443878179064075476379321",
            "length": 2641
        },
        "id": "CVE-2026-75146-89ad98a9",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://code.ffmpeg.org/FFmpeg/FFmpeg@65b0dab903e5975e036b30ecc58f5935d4f151e0",
        "target": {
            "file": "libavformat/dashdec.c",
            "function": "get_current_fragment"
        }
    }
]
vanir_signatures_modified 
"2026-09-30T08:16:43Z"