libarchive RAR out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in libarchive. The affected element is an unknown function of the component RAR Handler. This manipulation causes out-of-bounds. The identification of this vulnerability is CVE-2026-4424. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in libarchive (affected version unknown). It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component RAR Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

The advisory is shared at access.redhat.com. This vulnerability is known as CVE-2026-4424 since 03/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 306777 (Oracle Linux 10 : libarchive (ELSA-2026-8492)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (306777), EUVD (EUVD-2026-13097) and CERT Bund (WID-SEC-2026-0803). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Red Hat Enterprise Linux
  • Oracle Linux
  • NetApp ActiveIQ Unified Manager
  • RESF Rocky Linux
  • Open Source libarchive

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 306777
Nessus Name: Oracle Linux 10 : libarchive (ELSA-2026-8492)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/19/2026 Advisory disclosed
03/19/2026 +0 days CVE reserved
03/19/2026 +0 days VulDB entry created
08/31/2026 +165 days VulDB entry last update

Sourcesinfo

Advisory: access.redhat.com
Status: Not defined

CVE: CVE-2026-4424 (🔒)
GCVE (CVE): GCVE-0-2026-4424
GCVE (VulDB): GCVE-100-351709
EUVD: 🔒
CERT Bund: WID-SEC-2026-0803 - libarchive: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen und DoS

Entryinfo

Created: 03/19/2026 15:27
Updated: 08/31/2026 20:35
Changes: 03/19/2026 15:27 (61), 03/23/2026 02:57 (7), 03/24/2026 00:48 (1), 04/17/2026 08:22 (2), 05/04/2026 08:33 (1), 08/31/2026 20:35 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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