{"id":"CVE-2026-87875","title":"Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound","summary":"The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backen…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Red Hat","product":"cups-main","affected":["cups-main (all versions)","cups (all versions)","cups (all versions)","cups (all versions)","cups (all versions)","cups (all versions)","rhel9/cups (all versions)","rhcos/rhcos (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-09T17:57:56.759252Z"},"exploitAvailable":true,"published":"2026-09-09","updated":"2026-09-11","sourceUpdated":"2026-09-11T23:55:37.452Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-87875","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:66600","label":"RHSA-2026:66600"},{"url":"https://access.redhat.com/security/cve/CVE-2026-87875"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2530994","label":"RHBZ#2530994"},{"url":"https://github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142"},{"url":"https://github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4"},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq"}],"tags":["cve.org","exploit-available"],"epss":0.0032,"epssPercentile":0.2227,"ingestedAt":"2026-09-14T15:23:07.484Z","slug":"CVE-2026-87875","body":"## Overview\n\nThe cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backend/snmp-supplies.c with attacker-controlled content.\n\n## Affected\n\n- `cups-main (all versions)`\n- `cups (all versions)`\n- `cups (all versions)`\n- `cups (all versions)`\n- `cups (all versions)`\n- `cups (all versions)`\n- `rhel9/cups (all versions)`\n- `rhcos/rhcos (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nFixed on upstream master branch with commit 0c6842f and for versions 2.4.x with commit 2b1dc17.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":22196,"id":"CVE-2026-87875","ts":1788977915444,"field":"exploit_available","old":"false","new":"true"}]}