ubuntu-cve-2026-82327
Vulnerability from osv_ubuntu
Published
2026-08-28 16:18
Modified
2026-09-02 16:28
Summary
Details
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.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv0",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolvext0",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "python-solv",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.6.11-1.1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.11-1",
"0.6.11-1build1",
"0.6.11-1.1",
"0.6.11-1.1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv0",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolvext0",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "python-solv",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.6.30-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.28-2build1",
"0.6.30-1build1",
"0.6.30-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.6.36-2"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.6.36-2"
},
{
"binary_name": "libsolv0",
"binary_version": "0.6.36-2"
},
{
"binary_name": "libsolvext0",
"binary_version": "0.6.36-2"
},
{
"binary_name": "python3-solv",
"binary_version": "0.6.36-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.6.36-2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.35-2ubuntu1",
"0.6.35-2ubuntu2",
"0.6.36-1",
"0.6.36-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.7.20-1ubuntu0.22.04.1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.7.20-1ubuntu0.22.04.1"
},
{
"binary_name": "libsolv1",
"binary_version": "0.7.20-1ubuntu0.22.04.1"
},
{
"binary_name": "libsolvext1",
"binary_version": "0.7.20-1ubuntu0.22.04.1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.7.20-1ubuntu0.22.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.7.20-1ubuntu0.22.04.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.7.17-2",
"0.7.20-1",
"0.7.20-1build2",
"0.7.20-1ubuntu0.22.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.7.28-1build2"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.7.28-1build2"
},
{
"binary_name": "libsolv1",
"binary_version": "0.7.28-1build2"
},
{
"binary_name": "libsolvext1",
"binary_version": "0.7.28-1build2"
},
{
"binary_name": "python3-solv",
"binary_version": "0.7.28-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.7.28-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.7.35-1build1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.7.35-1build1"
},
{
"binary_name": "libsolv1",
"binary_version": "0.7.35-1build1"
},
{
"binary_name": "libsolvext1",
"binary_version": "0.7.35-1build1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.7.35-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.7.35-1build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.7.32-1",
"0.7.35-1",
"0.7.35-1build1"
]
}
],
"aliases": [],
"details": "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\u0027s 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.",
"id": "UBUNTU-CVE-2026-82327",
"modified": "2026-09-02T16:28:28Z",
"published": "2026-08-28T16:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-82327"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-82327"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525602"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-82327"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-82327"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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