Vulnerability-Lookup

WID-SEC-W-2026-2976

Vulnerability from csaf_certbund - Published: 2026-08-23 22:00 - Updated: 2026-09-28 22:00

Summary

GNU Emacs: Schwachstelle ermöglicht Offenlegung von Informationen und DoS

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: GNU Emacs ist Texteditor, welcher durch eine Programmierschnittstelle in der Programmiersprache Emacs Lisp mit beliebigen Erweiterungen ausgestattet werden kann.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU Emacs ausnutzen, um Informationen offenzulegen oder Denial-of-Service-Zustände herbeizuführen.

Betroffene Betriebssysteme: - Linux - UNIX - Windows

CVE-2026-77219

Affected products

Known affected 5 products

Product	Identifier	Version
Open Source GNU Emacs <31.0.91 Open Source / GNU Emacs		<31.0.91
SUSE openSUSE SUSE	`cpe:/o:suse:opensuse:-`	—
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—
Amazon Linux 2 Amazon	`cpe:/o:amazon:linux_2:-`	—
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—

References

13 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/emacs-mirror/emacs/releases/ta…	external
https://github.com/emacs-mirror/emacs/commit/b07e…	external
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81344	external
https://euvd.enisa.europa.eu/enisa/EUVD-2026-64138	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://lists.opensuse.org/archives/list/security…	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://alas.aws.amazon.com/AL2/ALAS2-2026-3944.html	external

JSON

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{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "GNU Emacs ist Texteditor, welcher durch eine Programmierschnittstelle in der Programmiersprache Emacs Lisp mit beliebigen Erweiterungen ausgestattet werden kann.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU Emacs ausnutzen, um Informationen offenzulegen oder Denial-of-Service-Zust\u00e4nde herbeizuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-2976 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2976.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-2976 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2976"
      },
      {
        "category": "external",
        "summary": "Emacs Release emacs-31.0.91 vom 2026-08-23",
        "url": "https://github.com/emacs-mirror/emacs/releases/tag/emacs-31.0.91"
      },
      {
        "category": "external",
        "summary": "Emacs GitHub Commit b07e634e4cf45162ae0178e32092b040587f2c6c vom 2026-08-23",
        "url": "https://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c"
      },
      {
        "category": "external",
        "summary": "GNU Bug 81344 vom 2026-08-23",
        "url": "https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81344"
      },
      {
        "category": "external",
        "summary": "EUVD-2026-64138 vom 2026-08-23",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-64138"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-8894DA1406 vom 2026-08-25",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-8894da1406"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-60EFF202E7 vom 2026-08-25",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-60eff202e7"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:21711-1 vom 2026-09-02",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/OAT5VW7FNPX4GARZ3AQRATQJTFJOL2KQ/"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:3993-1 vom 2026-09-12",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028897.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:4083-1 vom 2026-09-12",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028945.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:23589-1 vom 2026-09-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/029096.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2-2026-3944 vom 2026-09-29",
        "url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3944.html"
      }
    ],
    "source_lang": "en-US",
    "title": "GNU Emacs: Schwachstelle erm\u00f6glicht Offenlegung von Informationen und DoS",
    "tracking": {
      "current_release_date": "2026-09-28T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-29T08:49:33.350+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-2976",
      "initial_release_date": "2026-08-23T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-08-23T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-08-25T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Fedora aufgenommen"
        },
        {
          "date": "2026-09-02T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2026-09-13T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-09-16T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-09-28T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "6"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74178",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c31.0.91",
                "product": {
                  "name": "Open Source GNU Emacs \u003c31.0.91",
                  "product_id": "T058505"
                }
              },
              {
                "category": "product_version",
                "name": "31.0.91",
                "product": {
                  "name": "Open Source GNU Emacs 31.0.91",
                  "product_id": "T058505-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:gnu:emacs:31.0.91"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "GNU Emacs"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T054646",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T055946",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-77219",
      "product_status": {
        "known_affected": [
          "T058505",
          "T055946",
          "74178",
          "398363",
          "T054646"
        ]
      },
      "release_date": "2026-08-23T22:00:00.000+00:00",
      "title": "CVE-2026-77219"
    }
  ]
}

CVE-2026-77219 (GCVE-0-2026-77219)

Vulnerability from cvelistv5 – Published: 2026-08-21 20:20 – Updated: 2026-10-01 15:21 X_Open Source

Title

GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader

Summary

GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that allows an attacker to leak heap memory contents by supplying a crafted image with large dimensions and an elevated max color index. The image loader multiplies image dimensions and channel count using signed integer arithmetic; for sufficiently large values, the result wraps to a negative number, bypassing the bounds check and causing the pixel reader to access heap memory past the end of the allocated buffer. The over-read contents are interpreted as pixel color values and rendered on screen.

Severity

6.9 (Medium)


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

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 21:32 UTC

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-125 - Out-of-bounds Read

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81344	issue-tracking
https://github.com/emacs-mirror/emacs/releases/ta…	release-notes
https://github.com/emacs-mirror/emacs/commit/b07e…	patch
https://www.vulncheck.com/advisories/gnu-emacs-he…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
GNU	Emacs	Affected: 0 , < 31.0.91 (semver) cpe:2.3:a:gnu:emacs::::::::

Date Public

2026-07-01 00:00

Credits

Tristan Madani

Show details on NVD website

JSON

To clipboard

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      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-77219",
                "options": [
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                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T21:32:45.496424Z",
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      "metrics": [
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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.

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

WID-SEC-W-2026-2976

CVE-2026-77219 (GCVE-0-2026-77219)

Tags

Sightings

Nomenclature

Related by attack behaviour