{"id":"CVE-2026-77118","aliases":["DEBIAN-CVE-2026-77118","EUVD-2026-63345","GHSA-qjrj-qxx7-fc4j","OESA-2026-3656","UBUNTU-CVE-2026-77118"],"status":"published","title":"Out-of-bounds write in GraphicsMagick PCD decoder","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.\n\n\n\nA crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","severity":{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00171,"percentile":0.06609,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2026-08-20T12:42:42Z","modified":"2026-10-28T10:00:30Z","fixes":[{"ecosystem":"Debian:14","package":"graphicsmagick","fixed_in":["1.4+really1.3.48-1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"GraphicsMagick","fixed_in":["1.3.41-4.oe2003sp4"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"GraphicsMagick","fixed_in":["1.3.41-4.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"GraphicsMagick","fixed_in":["1.3.41-4.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"GraphicsMagick","fixed_in":["1.3.41-4.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"GraphicsMagick","fixed_in":["1.3.47-2.oe2403sp4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.40-4","1.4+really1.3.40-4+deb12u1","1.4+really1.3.41-1","1.4+really1.3.42-1","1.4+really1.3.42-1.1","1.4+really1.3.42-1.1~exp1","1.4+really1.3.43-1","1.4+really1.3.44-1","1.4+really1.3.45+hg17689-1","1.4+really1.3.45+hg17692-1","1.4+really1.3.45+hg17696-1","1.4+really1.3.45-1","1.4+really1.3.46-1","1.4+really1.3.46-2","1.4+really1.3.48-1","1.4+really1.3.48-2","1.4+really1.3.49-1"]},{"source":"osv","ecosystem":"Debian:13","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.45+hg17696-1","1.4+really1.3.46-1","1.4+really1.3.46-2","1.4+really1.3.48-1","1.4+really1.3.48-2","1.4+really1.3.49-1"]},{"source":"osv","ecosystem":"Debian:14","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4+really1.3.48-1"}]}],"versions":["1.4+really1.3.45+hg17696-1","1.4+really1.3.46-1","1.4+really1.3.46-2"]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"GraphicsMagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.41-4.oe2003sp4"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"GraphicsMagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.41-4.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"GraphicsMagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.41-4.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"GraphicsMagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.41-4.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"GraphicsMagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.47-2.oe2403sp4"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.16-1.1ubuntu2","1.3.16-1.1ubuntu3","1.3.18-1ubuntu3","1.3.18-1ubuntu3.1","1.3.18-1ubuntu3.1+esm1","1.3.18-1ubuntu3.1+esm2","1.3.18-1ubuntu3.1+esm3","1.3.18-1ubuntu3.1+esm4","1.3.18-1ubuntu3.1+esm5","1.3.18-1ubuntu3.1+esm6","1.3.18-1ubuntu3.1+esm7","1.3.18-1ubuntu3.1+esm8"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.21-3","1.3.23-1","1.3.23-1build1","1.3.23-1ubuntu0.1","1.3.23-1ubuntu0.1+esm1","1.3.23-1ubuntu0.2","1.3.23-1ubuntu0.3","1.3.23-1ubuntu0.4","1.3.23-1ubuntu0.5","1.3.23-1ubuntu0.6","1.3.23-1ubuntu0.6+esm1","1.3.23-1ubuntu0.6+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.26-15","1.3.26-16","1.3.26-19","1.3.27-1","1.3.27-2","1.3.27-3","1.3.28-1","1.3.28-2","1.3.28-2ubuntu0.1","1.3.28-2ubuntu0.1+esm1","1.3.28-2ubuntu0.2","1.3.28-2ubuntu0.2+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.33+hg16115-1","1.4+really1.3.33+hg16115-1build1","1.4+really1.3.33+hg16117-1","1.4+really1.3.34-1","1.4+really1.3.34-2","1.4+really1.3.34+hg16181-1","1.4+really1.3.35-1","1.4+really1.3.35-1ubuntu0.1~esm1","1.4+really1.3.35-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.36+hg16481-2","1.4+really1.3.37-1","1.4+really1.3.37-1build1","1.4+really1.3.37+hg16662-1ubuntu1","1.4+really1.3.38-1","1.4+really1.3.38-1ubuntu0.1","1.4+really1.3.38-1ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.42-1","1.4+really1.3.42-1build1","1.4+really1.3.42-1.1build1","1.4+really1.3.42-1.1build2","1.4+really1.3.42-1.1build3","1.4+really1.3.42-1.1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"graphicsmagick","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4+really1.3.45+hg17696-1build1","1.4+really1.3.46-2"]}],"products":[{"vendor":"debian","product":"graphicsmagick"},{"vendor":"fedora project","product":"graphicsmagick"},{"vendor":"graphicsmagick group","product":"graphicsmagick"}],"references":[{"url":"https://foss.heptapod.net/graphicsmagick/graphicsmagick/-/commit/937cdd9920bd96","tags":["patch"]},{"url":"https://foss.heptapod.net/graphicsmagick/graphicsmagick/-/raw/GraphicsMagick-1_3_48/ChangeLog","tags":["release-notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77118","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qjrj-qxx7-fc4j"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-77118","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3656","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-77118","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-77118","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-77118","title":"Out-of-bounds write in GraphicsMagick PCD decoder","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.\n\n\n\nA crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T12:42:42.952Z","modified":"2026-08-26T19:51:24.566Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:20:15.712761Z"}],"euvd":[{"id":"EUVD-2026-63345","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.\n\n\n\nA crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T12:42:42Z","modified":"2026-08-26T19:51:24Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:01:29.296861Z"}],"ghsa":[{"id":"GHSA-qjrj-qxx7-fc4j","title":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage...","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.\n\n\n\nA crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T15:34:17Z","modified":"2026-08-20T15:34:20Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/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","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:10:46.520021Z"}],"nvd":[{"id":"CVE-2026-77118","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.\n\n\n\nA crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T13:19:07.077Z","modified":"2026-10-27T10:10:00.24Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/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","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:40.302911Z"}],"osv":[{"id":"DEBIAN-CVE-2026-77118","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.    A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T13:19:07.077Z","modified":"2026-10-28T10:00:30.705861658Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/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","level":"high"}],"updated_at":"2026-11-02T15:46:03.502256Z"},{"id":"OESA-2026-3656","title":"GraphicsMagick security update","description":"GraphicsMagick is a comprehensive image processing package which is initially based on ImageMagick 5.5.2, but which has undergone significant re-work by the GraphicsMagick Group to significantly improve the quality and performance of the software.\r\n\r\nSecurity Fix(es):\n\nA heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.(CVE-2026-77118)","status":"published","published":"2026-09-05T15:03:35Z","modified":"2026-09-05T15:16:36.835935082Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/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","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"UBUNTU-CVE-2026-77118","description":"A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.","status":"published","published":"2026-08-20T13:19:00Z","modified":"2026-09-02T19:36:50.035548775Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:13.483205Z"}]}}