CVE-2026-75143

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Source
https://cve.org/CVERecord?id=CVE-2026-75143
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-75143.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-75143
Downstream
CGA (8)
DEBIAN (1)
ECHO (1)
MGASA (1)
OESA (3)
openSUSE (5)
SUSE (2)
UBUNTU (1)
Related
openSUSE (5)
SUSE (2)
Published
2026-08-19T16:26:12Z
Modified
2026-09-30T08:16:43Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FFmpeg Heap Buffer Overflow via RIST Protocol Reader
Details

FFmpeg before commit 1c10bcc contains a heap buffer overflow in the RIST protocol reader (libavformat/librist.c). librist_read() ignored its size argument and copied the full received payload length into the caller-provided destination buffer, overflowing it when the payload exceeds the destination size. This is reachable via the async:rist:// URL scheme, where the async wrapper supplies a smaller buffer than the received payload. A remote RIST sender can trigger the overflow by sending a packet whose payload exceeds the caller buffer size.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75143.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
1c10bcc2e17255dacb717a25ab3db142ce390602

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-2026-75143.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "97249350619625308263957425350294850913",
            "length": 823
        },
        "id": "CVE-2026-75143-36c8de1b",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://code.ffmpeg.org/FFmpeg/FFmpeg@1c10bcc2e17255dacb717a25ab3db142ce390602",
        "target": {
            "file": "libavformat/librist.c",
            "function": "librist_read"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "209479367545176159242548432915615380880",
                "122579600661420517794396003575211448951",
                "231738526450127217747588192686013491057",
                "223286030573630431611526172918625719647"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-75143-5cf0df36",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://code.ffmpeg.org/FFmpeg/FFmpeg@1c10bcc2e17255dacb717a25ab3db142ce390602",
        "target": {
            "file": "libavformat/librist.c"
        }
    }
]
vanir_signatures_modified 
"2026-09-30T08:16:43Z"