GHSA-XG29-8GHV-V4XR

Vulnerability from github – Published: 2026-03-12 14:01 – Updated: 2026-03-12 14:01
VLAI?
Summary
ImageMagick Has Signed Integer Overflow in SIXEL Decoder, Leading to Memory Corruption
Details

A signed integer overflow vulnerability in ImageMagick's SIXEL decoder allows an attacker to trigger memory corruption and denial of service when processing a maliciously crafted SIXEL image file. The vulnerability occurs during buffer reallocation operations where pointer arithmetic using signed 32-bit integers overflows.

AddressSanitizer:DEADLYSIGNAL
=================================================================
==143838==ERROR: AddressSanitizer: UNKNOWN SIGNAL on unknown address 0x000000000000
    #0 0x7f379d5adb53  (/lib/x86_64-linux-gnu/libc.so.6+0xc4b53)
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Show details on source website
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  "aliases": [
    "CVE-2026-25970"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-12T14:01:54Z",
    "nvd_published_at": "2026-02-24T02:16:01Z",
    "severity": "MODERATE"
  },
  "details": "A signed integer overflow vulnerability in ImageMagick\u0027s SIXEL decoder allows an attacker to trigger memory corruption and denial of service when processing a maliciously crafted SIXEL image file. The vulnerability occurs during buffer reallocation operations where pointer arithmetic using signed 32-bit integers overflows.\n\n```\nAddressSanitizer:DEADLYSIGNAL\n=================================================================\n==143838==ERROR: AddressSanitizer: UNKNOWN SIGNAL on unknown address 0x000000000000\n    #0 0x7f379d5adb53  (/lib/x86_64-linux-gnu/libc.so.6+0xc4b53)\n```",
  "id": "GHSA-xg29-8ghv-v4xr",
  "modified": "2026-03-12T14:01:55Z",
  "published": "2026-03-12T14:01:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-xg29-8ghv-v4xr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25970"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ImageMagick/ImageMagick"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ImageMagick Has Signed Integer Overflow in SIXEL Decoder, Leading to Memory Corruption"
}


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