Denial-of-Service Vulnerability in RAR5 Archive Handling of Libarchive
CVE-2026-4111
7.5HIGH
Key Information:
- Vendor
Red Hat
- Status
- Vendor
- CVE Published:
- 13 March 2026
What is CVE-2026-4111?
A vulnerability in the RAR5 archive decompression logic of the libarchive library allows attackers to exploit a flaw in the archive_read_data() processing path. This issue arises when a specially crafted RAR5 archive is processed, causing the decompression routine to enter an infinite loop, leading to excessive CPU resource consumption. Since the affected archives pass checksum validation, applications may be unable to detect the flaw, resulting in service disruptions for processes that automatically handle archive files.
Affected Version(s)
Red Hat Enterprise Linux 10 0:3.7.7-5.el10_1
Red Hat Enterprise Linux 9 0:3.5.3-7.el9_7
Red Hat Enterprise Linux 9 0:3.5.3-7.el9_7
References
CVSS V3.1
Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Red Hat would like to thank Elhanan Haenel for reporting this issue.