{"id":"CVE-2026-55480","aliases":["AZL-108284","BELL-CVE-2026-55480","DEBIAN-CVE-2026-55480","EUVD-2026-102205","GHSA-jj94-x3qh-ffp9","MGASA-2026-0483","RHSA-2026:84421","UBUNTU-CVE-2026-55480","openSUSE-SU-2026:12192-1"],"status":"published","title":"CUPS copy_model() creates a predictable PPD tempfile without O_EXCL/O_NOFOLLOW (symlink TOCTOU, lp → root)","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00202,"percentile":0.10285,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-377","CWE-59"],"published":"2026-10-07T06:07:04.685729Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Alpaquita:23","package":"cups","fixed_in":["2.4.20-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"cups","fixed_in":["2.4.20-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"cups","fixed_in":["2.4.20-r0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.4.19-2"}]}]},{"source":"osv","ecosystem":"Alpaquita:23","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.2-r2"},{"fixed":"2.4.20-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:25","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.11-r1"},{"fixed":"2.4.20-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.2-r5"},{"fixed":"2.4.20-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-1","2.4.10-2","2.4.10-3","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.2-3","2.4.2-3+deb12u1","2.4.2-3+deb12u2","2.4.2-3+deb12u3","2.4.2-3+deb12u4","2.4.2-3+deb12u5","2.4.2-3+deb12u6","2.4.2-3+deb12u7","2.4.2-3+deb12u8","2.4.2-3+deb12u9","2.4.2-4","2.4.2-5","2.4.2-6","2.4.20-1","2.4.7-1","2.4.7-1.1","2.4.7-1.2","2.4.7-2","2.4.7-3"]},{"source":"osv","ecosystem":"Debian:13","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-3","2.4.10-3+deb13u1","2.4.10-3+deb13u2","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.20-1"]},{"source":"osv","ecosystem":"Debian:14","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-3","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.20-1"]},{"source":"osv","ecosystem":"Mageia:10","package":"cups","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.20-1.mga10"}]}],"bundled":7},{"source":"osv","ecosystem":"Red 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Advisory","advisory","article","report"]},{"url":"https://github.com/OpenPrinting/cups/commit/98adfd855950e806508f961d5438ad32e26aac62","tags":["x_refsource_MISC","Patch","fix","article"]},{"url":"https://github.com/OpenPrinting/cups/commit/f6a11dae0f0f3b748fbca931e237be03ffe8e48e","tags":["x_refsource_MISC","Patch","fix","article"]},{"url":"https://github.com/OpenPrinting/cups/releases/tag/v2.4.20","tags":["x_refsource_MISC","Release Notes","web","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55480","tags":["web","advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-55480","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55480.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-55480","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0483.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36331","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/KX5YFUOJ5JKV64QGD4WMERKGBI43OV3M/","tags":["web"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq","tags":["advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2026/10/05/6","tags":["web"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7j85-5r23-xhvh","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-gq9p-4w7m-2f5g","tags":["advisory","article"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-w9hj-hq9p-m7f6","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-qqm8-4q5h-jg55","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-fw7q-ww8w-phx8","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-wjc4-qhjr-5m5x","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","tags":["advisory","article"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-gj33-wxpv-6fgg","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-69qc-prxg-h2c7","tags":["advisory","article"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:84421","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-55453","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-55467","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-55480","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-61702","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_84421.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553616","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55453","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55453","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7","tags":["article"]},{"url":"https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553617","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55467","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55467","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/commit/0cf4e7814d6810ed3c454222bce3aa342d541681","tags":["article"]},{"url":"https://github.com/OpenPrinting/cups/commit/a9e7e7a3a019d0fa063d29409d3f82e4c6d5a008","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553613","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55480","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553611","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61702","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61702","tags":["advisory"]},{"url":"https://github.com/OpenPrinting/cups/commit/08a8a277ce2a8948a1af33552247a1ac53b72df3","tags":["article"]},{"url":"https://github.com/OpenPrinting/cups/commit/6650428234616a97d3298e0e2d4419c62c1339d2","tags":["article"]},{"url":"https://ubuntu.com/security/CVE-2026-55480","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-55480","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-105326","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55453","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55467","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55480","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61702","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-87876","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-55480","title":"CUPS copy_model() creates a predictable PPD tempfile without O_EXCL/O_NOFOLLOW (symlink TOCTOU, lp → root)","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T17:09:33.878Z","modified":"2026-10-20T02:59:10.167Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-59","CWE-377"],"updated_at":"2026-11-02T14:20:11.925815Z"}],"euvd":[{"id":"EUVD-2026-102205","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T17:09:33Z","modified":"2026-10-20T02:59:10Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T16:59:44.419021Z"}],"nvd":[{"id":"CVE-2026-55480","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T18:17:27.987Z","modified":"2026-10-20T19:37:33.393Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-59","CWE-377"],"updated_at":"2026-11-02T14:12:59.751798Z"}],"osv":[{"id":"BELL-CVE-2026-55480","status":"published","published":"2026-10-07T06:07:04.685729Z","modified":"2026-10-22T08:30:04.027526309Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:24.657778Z"},{"id":"CVE-2026-55480","title":"CUPS copy_model() creates a predictable PPD tempfile without O_EXCL/O_NOFOLLOW (symlink TOCTOU, lp → root)","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T17:09:33.878Z","modified":"2026-10-28T11:14:51.386919879Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"cwes":["CWE-377","CWE-59"],"updated_at":"2026-11-02T15:45:11.22012Z"},{"id":"DEBIAN-CVE-2026-55480","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T18:17:27.987Z","modified":"2026-10-23T17:47:44.679365634Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"RHSA-2026:84421","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-10-18T10:05:16Z","modified":"2026-10-20T10:43:34.134711625Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"UBUNTU-CVE-2026-55480","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T18:17:00Z","modified":"2026-10-28T20:17:23.560859716Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"AZL-108284","title":"CVE-2026-55480 affecting package cups 2.4.19-2","description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/\u003cconnection-number\u003e.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.","status":"published","published":"2026-10-15T18:17:27Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.199293Z"},{"id":"MGASA-2026-0483","title":"Updated cups package fixes security vulnerabilities","description":"CUPS ipp backend status-line injection can update queue PPD and lead to\nconditional RCE as lp via foomatic-rip. (CVE-2026-55453)\nCUPS fax option values bypass the CVE-2026-34980 control-character\nsanitizer (incomplete fix). (CVE-2026-55467)\ncopy_model() creates a predictable PPD tempfile without\nO_EXCL/O_NOFOLLOW. (CVE-2026-55480)\nroot-side banner file disclosure. (CVE-2026-61702)\nHeap out-of-bounds read in cupsUTF32ToUTF8() via missing source-length\nbound — reachable from SNMP supply-description parsing\n(backend/snmp-supplies.c). (CVE-2026-87875)\nCVE-2026-27447 follow-up: remaining case-insensitive username matching\nin scheduler side paths. (CVE-2026-87876)\nArgument injection in mailto notifier allows unauthenticated remote code\nexecution. (CVE-2026-105326)\n","status":"published","published":"2026-10-12T18:47:12Z","modified":"2026-10-12T19:13:25.022728597Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:12192-1","title":"cups-2.4.20-1.1 on GA media","description":"These are all security issues fixed in the cups-2.4.20-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-20T00:00:00Z","modified":"2026-10-21T17:23:12.957990239Z","updated_at":"2026-11-02T16:58:40.245664Z"}]}}