Medium
libsolv — security advisory
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 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.
- Products
- libsolv
- Affected versions
- 0.6.11-1, 0.6.11-1.1, 0.6.11-1.1ubuntu0.1~esm1, 0.6.11-1build1, 0.6.28-2build1, 0.6.30-1build1, 0.6.30-1ubuntu0.1~esm1, 0.6.35-2ubuntu1, 0.6.35-2ubuntu2, 0.6.36-1, 0.6.36-2, 0.7.17-2, 0.7.20-1, 0.7.20-1build2, 0.7.20-1ubuntu0.22.04.1, 0.7.24-1, 0.7.25-1, 0.7.26-1, 0.7.26-2, 0.7.27-1, 0.7.27-2, 0.7.27-2build1, 0.7.28-1, 0.7.28-1build1, 0.7.28-1build2, 0.7.32-1, 0.7.35-1, 0.7.35-1build1, 0.7.38-1, 0.7.39-1, 0.7.39-1build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-82327
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:21 UTC · Revision 1
Source evidence
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 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.
osv:UBUNTU-CVE-2026-82327
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
libsolv
Fixed versions: Not specified
Complete source record
{
"id": "03ed84133beaa2df88591c3e0262f695976499586dec6afd20808d89ed4c827d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-82327",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-82327",
"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 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.",
"evidence": "osv:UBUNTU-CVE-2026-82327",
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"severity": "medium",
"structured": {
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"aliases": [
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"metrics": [
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],
"modified": "2026-10-17T13:01:11.838378128Z",
"provider": "osv",
"upstream": [
"CVE-2026-82327"
],
"references": [
"https://ubuntu.com/security/CVE-2026-82327",
"https://www.cve.org/CVERecord?id=CVE-2026-82327",
"https://bugzilla.redhat.com/show_bug.cgi?id=2525602",
"https://access.redhat.com/security/cve/CVE-2026-82327"
]
},
"related_cves": [
{
"value": "CVE-2026-82327",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361201,
"published_at": "2026-08-28T16:18:00+00:00"
}