libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.
Priority MEDIUM 46CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.
Why it matters now
EPSS 0.02304 83rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-12942
- 2026-10-03 Alias added: GHSA-6cw7-hrcm-224w
References
More RARLAB Unrar vulnerabilities
- TI-2022-12568 RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files… KEVCVSS 3.1CRITICAL 9.8
- TI-2012-05408 A VMSF_DELTA memory corruption was discovered in unrar before 5.5.5, as used in Sophos… CVSS 3.0CRITICAL 9.8
- TI-2017-09586 libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the Unpack::Unpack20 function. CVSS 3.0CRITICAL 9.8
- TI-2017-09585 libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the EncodeFileName::Decode… CVSS 3.0CRITICAL 9.8
- TI-2017-10285 unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a stack-based buffer over-read in… CVSS 3.1CRITICAL 9.1
- TI-2022-24115 UnRAR before 6.2.3 allows extraction of files outside of the destination folder via symlink chains. CVSS 3.1HIGH 7.5
Sources
- CVE-2017-12942 · CVE Program
- CVE-2017-12942 · NVD
- FIRST EPSS
- GHSA-6cw7-hrcm-224w · GitHub Advisory Database · CC BY 4.0
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