{"id":"CVE-2026-82327","title":"Libsolv: libsolv: out-of-bounds write in repo_write() via unvalidated directory id from vertical/paged .solv filelist data","summary":"A flaw was found in libsolv, a dependency-resolution library used by RPM-based package managers such as dnf and zypper to work with .solv repository cache files. When libsolv rewrites a .solv cache file, it reads directory-id values from…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-129"],"vendor":"Red Hat","product":"libsolv","affected":["libsolv (all versions)","libsolv (all versions)","libsolv (all versions)","libsolv (all versions)","libsolv (all versions)","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","libsolv (all versions)","libsolv0 (all versions)","python3.12-solv (all versions)","python-solv (all versions)","libsolv (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-28T16:07:47.382953Z"},"published":"2026-08-28","updated":"2026-10-21","sourceUpdated":"2026-10-21T20:06:20.412Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-82327","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-82327"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525602","label":"RHBZ#2525602"}],"tags":["cve.org"],"epss":0.00163,"epssPercentile":0.05134,"ingestedAt":"2026-10-21T18:09:27.271Z","slug":"CVE-2026-82327","body":"## Overview\n\nA flaw was found in libsolv, a dependency-resolution library used by RPM-based package managers such as dnf and zypper to work with .solv repository cache files. When libsolv rewrites a .solv cache file, it reads directory-id values from the file's compressed filelist data without validating that they fall within the expected range. A corrupted or specially crafted .solv cache file (for example, one left in a torn state after an unclean system shutdown) can cause an out-of-bounds memory write when a tool such as dnf, yum, or zypper next processes it. Successful exploitation is expected to result in a crash of the affected tool (denial of service); it is not expected to allow arbitrary code execution because the out-of-bounds write always stores a fixed, non-attacker-controlled value.\n\n## Affected\n\n- `libsolv (all versions)`\n- `libsolv (all versions)`\n- `libsolv (all versions)`\n- `libsolv (all versions)`\n- `libsolv (all versions)`\n- `openshift/ose-rhel-coreos-8 (all versions)`\n- `openshift/ose-rhel-coreos-9 (all versions)`\n- `libsolv (all versions)`\n- `libsolv0 (all versions)`\n- `python3.12-solv (all versions)`\n- `python-solv (all versions)`\n- `libsolv (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nNo mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}