CVE-2026-77219

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Source
https://cve.org/CVERecord?id=CVE-2026-77219
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77219.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77219
Downstream
Related
Published
2026-08-21T20:20:45Z
Modified
2026-09-02T18:25:54Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-125",
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77219.json"
}
References

Affected packages

Git / github.com/emacs-mirror/emacs

Affected ranges

Type
GIT
Repo
https://github.com/emacs-mirror/emacs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
57581b8bc2f73229d1f03dd5655aabb4a6de6183
Fixed
b07e634e4cf45162ae0178e32092b040587f2c6c
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "31.0.91"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

emacs-19.*
emacs-19.34
emacs-20.*
emacs-20.1
emacs-20.2
emacs-20.3
emacs-20.4
emacs-31.*
emacs-31.0.90
emacs-pretest-21.*
emacs-pretest-21.0.100
emacs-pretest-21.0.101
emacs-pretest-21.0.102
emacs-pretest-21.0.103
emacs-pretest-21.0.104
emacs-pretest-21.0.105
emacs-pretest-21.0.106
emacs-pretest-21.0.90
emacs-pretest-21.0.91
emacs-pretest-21.0.92
emacs-pretest-21.0.93
emacs-pretest-21.0.95
emacs-pretest-21.0.96
emacs-pretest-21.0.97
emacs-pretest-21.0.98
emacs-pretest-21.0.99
emacs-pretest-22.*
emacs-pretest-22.0.90
emacs-pretest-22.0.91
emacs-pretest-22.0.92
emacs-pretest-22.0.93
emacs-pretest-22.0.94
emacs-pretest-22.0.95
emacs-pretest-22.0.96
emacs-pretest-22.0.97
emacs-pretest-22.0.98
emacs-pretest-23.*
emacs-pretest-23.0.90
emacs-pretest-23.0.91
emacs-pretest-23.0.92
emacs-pretest-23.0.93
emacs-pretest-23.0.94
emacs-pretest-23.0.95
emacs-pretest-23.1.90
emacs-pretest-23.1.91
emacs-pretest-23.1.92
mh-e-8.*
mh-e-8.0
mh-e-8.0.1
mh-e-8.0.2
mh-e-8.0.3
mh-e-8.1
mh-e-8.2
mh-e-doc-8.*
mh-e-doc-8.0
mh-e-doc-8.0.1
mh-e-doc-8.0.3
mh-e-doc-8.1
mh-e-doc-8.2
Other
ttn-vms-21-2-B4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77219.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "258673638944095828071566080484646474381",
            "length": 4506
        },
        "id": "CVE-2026-77219-c667c86f",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c",
        "target": {
            "file": "src/image.c",
            "function": "pbm_load"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "195389056970384225465457360733826923154",
                "30743957392029437298895236527953516614",
                "111340952189053751276040701366772383005",
                "191098332935111733868625331608384229249",
                "138792707373502694081969352469803653663",
                "153138648923648074605034718771059639440",
                "65634003212636966256027357271456261512",
                "310229738444058907868078119131101498351",
                "164932963844408134274952941465718873097",
                "124303929148704238738091731722928157762",
                "120583420899258265332683383904982012131",
                "272595218324774214439785912951772159062",
                "105183179690217016208969693874981039260",
                "58673321751195478723877138963568116108",
                "309138827984967736707121349168452132665"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-77219-e8dc267d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c",
        "target": {
            "file": "src/image.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-24T03:59:17Z"