Vulnerability-Lookup

GHSA-WQ77-GG6M-97HH

Vulnerability from github – Published: 2026-10-14 15:32 – Updated: 2026-10-14 18:32

Details

L-SMASH through 2.14.5 contains an infinite loop vulnerability in vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang applications via crafted input files. Attackers can supply a file consisting only of zero bytes, which lsmash_read_file() probes automatically, causing indefinite CPU consumption and denial of service.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

6.8 (Medium)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2016-20099"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T15:16:58Z",
    "severity": "MODERATE"
  },
  "details": "L-SMASH through 2.14.5 contains an infinite loop vulnerability in vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang applications via crafted input files. Attackers can supply a file consisting only of zero bytes, which lsmash_read_file() probes automatically, causing indefinite CPU consumption and denial of service.",
  "id": "GHSA-wq77-gg6m-97hh",
  "modified": "2026-10-14T18:32:09Z",
  "published": "2026-10-14T15:32:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-20099"
    },
    {
      "type": "WEB",
      "url": "https://github.com/l-smash/l-smash/pull/58"
    },
    {
      "type": "WEB",
      "url": "https://github.com/l-smash/l-smash/blob/v2.14.5/importer/vc1_imp.c#L462-L488"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@haind-pwn/l-smash-hevc-importer-double-free"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/l-smash-through-2.14.5-infinite-loop-in-vc-1-importer-probe"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2016-20099 (GCVE-0-2016-20099)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:16 – Updated: 2026-10-14 17:44

Title

L-SMASH through 2.14.5 Infinite Loop in VC-1 Importer Probe

Summary

Severity

6.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 17:44 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6106 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/l-smash/l-smash/pull/58	patchissue-tracking
https://github.com/l-smash/l-smash/blob/v2.14.5/i…	technical-description
https://hackmd.io/@haind-pwn/l-smash-hevc-importe…	third-party-advisory
https://www.vulncheck.com/advisories/l-smash-thro…	third-party-advisory
https://hackmd.io/@haind-pwn/cve-2016-20099-2026-…	exploit

Impacted products

1 product

Vendor	Product	Version
l-smash	l-smash	Affected: 0 , ≤ 2.14.5 (semver)

Date Public

2016-01-30 00:00

Credits

canbal HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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  "containers": {
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                "id": "CVE-2016-20099",
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-14T17:44:23.771001Z",
                "version": "2.0.3"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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