Tool crash via unvalidated filelist directory ID
Published Aug 28, 2026 · Updated Aug 28, 2026
Out-of-bounds write in libsolv allows local users to crash package-management tools by inducing processing of a crafted .solv cache. In repo_write(), the vertical/paged filelist decoder uses an unvalidated directory ID from KEY_STORAGE_VERTICAL_OFFSET data as a write index and stores the fixed value 1 outside the expected array. Triggering requires dnf, yum, zypper, dumpsolv, or another consumer to load and rewrite the cache; the bounded consequence is a tool crash, not code execution or data compromise.
Summary
What happened
Out-of-bounds write in libsolv allows local users to crash package-management tools by inducing processing of a crafted .solv cache. In repo_write(), the vertical/paged filelist decoder uses an unvalidated directory ID from KEY_STORAGE_VERTICAL_OFFSET data as a write index and stores the fixed value 1 outside the expected array. Triggering requires dnf, yum, zypper, dumpsolv, or another consumer to load and rewrite the cache; the bounded consequence is a tool crash, not code execution or data compromise.
The record
- CVE
- CVE-2026-82327
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-129, T1499.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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