Vulnerability-Lookup

UBUNTU-CVE-2026-116591 (CVE-2026-116591)

Vulnerability from osv_ubuntu – Published: 2026-10-26 22:16 – Updated: 2026-10-26 22:16 – Source website

Details

compress provides various compression algorithms. Prior to 1.20.2, the zstd DecodeAll and streaming decoder paths can panic when a crafted two-block frame reaches huff0.ReadTable with an FSE normalized count of 32768 that readNCount stores in int16 as -32768. The wrapped count allows buildDtable to retain stale fse.Scratch decode-table state from the prior block, and nextFast then derives an out-of-range state and indexes beyond the table instead of returning a decode error. Both blocks are required to preserve and then reuse the stale state, allowing untrusted zstd input to crash an application. This issue is fixed in version 1.20.2.

Severity

8.7 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-116591	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-116591	REPORT
	https://github.com/klauspost/compress/commit/7f5d…	REPORT
	https://github.com/klauspost/compress/releases/ta…	REPORT
	https://github.com/klauspost/compress/security/ad…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "0.0~git20151221.0.2dd54ae-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@0.0~git20151221.0.2dd54ae-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0~git20151221.0.2dd54ae-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.2.1-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.2.1-5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-1",
        "1.2.1-2",
        "1.2.1-4",
        "1.2.1-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.9.5-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.9.5-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-5",
        "1.7.6-2",
        "1.9.5-1",
        "1.9.5-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.11.7-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.11.7-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.11.7-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.17.7+ds1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.17.7+ds1-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.15.12+ds1-3",
        "1.17.7+ds1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.20.0+ds1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.20.0+ds1-1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.1+ds1-1",
        "1.19.0+ds1-1",
        "1.20.0+ds1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-klauspost-compress-dev",
            "binary_version": "1.18.1+ds1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "golang-github-klauspost-compress",
        "purl": "pkg:deb/ubuntu/golang-github-klauspost-compress@1.18.1+ds1-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.0+ds1-1",
        "1.18.1+ds1-1"
      ]
    }
  ],
  "aliases": [],
  "details": "compress provides various compression algorithms. Prior to 1.20.2, the zstd DecodeAll and streaming decoder paths can panic when a crafted two-block frame reaches huff0.ReadTable with an FSE normalized count of 32768 that readNCount stores in int16 as -32768. The wrapped count allows buildDtable to retain stale fse.Scratch decode-table state from the prior block, and nextFast then derives an out-of-range state and indexes beyond the table instead of returning a decode error. Both blocks are required to preserve and then reuse the stale state, allowing untrusted zstd input to crash an application. This issue is fixed in version 1.20.2.",
  "id": "UBUNTU-CVE-2026-116591",
  "modified": "2026-10-26T22:16:00Z",
  "published": "2026-10-26T22:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-116591"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-116591"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/klauspost/compress/releases/tag/v1.20.2"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-116591"
  ]
}

CVE-2026-116591 (GCVE-0-2026-116591)

Vulnerability from cvelistv5 – Published: 2026-10-26 21:54 – Updated: 2026-10-27 14:16

Title

compress zstd: Panic on two-block frames

Summary

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-27 13:46 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8053 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/klauspost/compress/security/ad…	x_refsource_CONFIRM
https://github.com/klauspost/compress/commit/7f5d…	x_refsource_MISC
https://github.com/klauspost/compress/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
klauspost	compress	Affected: < 1.20.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-116591",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-27T13:46:04.382421Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-27T14:16:30.395Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "compress",
          "vendor": "klauspost",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.20.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "compress provides various compression algorithms. Prior to 1.20.2, the zstd DecodeAll and streaming decoder paths can panic when a crafted two-block frame reaches huff0.ReadTable with an FSE normalized count of 32768 that readNCount stores in int16 as -32768. The wrapped count allows buildDtable to retain stale fse.Scratch decode-table state from the prior block, and nextFast then derives an out-of-range state and indexes beyond the table instead of returning a decode error. Both blocks are required to preserve and then reuse the stale state, allowing untrusted zstd input to crash an application. This issue is fixed in version 1.20.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "CWE-190: Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T21:55:20.476Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8"
        },
        {
          "name": "https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d"
        },
        {
          "name": "https://github.com/klauspost/compress/releases/tag/v1.20.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klauspost/compress/releases/tag/v1.20.2"
        }
      ],
      "source": {
        "advisory": "GHSA-fpmh-frq8-7rj8",
        "discovery": "UNKNOWN"
      },
      "title": "compress zstd: Panic on two-block frames"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-116591",
    "datePublished": "2026-10-26T21:54:33.109Z",
    "dateReserved": "2026-10-26T15:03:39.037Z",
    "dateUpdated": "2026-10-27T14:16:30.395Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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.

Action not permitted