Red Hat Security Advisory: libssh security update
Multiple vulnerabilities have been identified in libssh, a library implementing the SSH protocol used in client and server applications. These include a buffer underflow on invalid input, improper sanitation of paths from SCP servers, and several denial of service (DoS) issues related to configuration file handling, regular expression processing, and malformed SFTP messages. Red Hat has released an update for Red Hat Enterprise Linux 10 to address these issues. The security impact is rated as moderate. No known exploits are reported in the wild at this time.
AI Analysis
Technical Summary
This advisory covers five security vulnerabilities in libssh: CVE-2026-0964 (improper sanitation of SCP server paths), CVE-2026-0965 (DoS via improper configuration file handling), CVE-2026-0966 (buffer underflow in ssh_get_hexa()), CVE-2026-0967 (DoS via inefficient regex processing), and CVE-2026-0968 (DoS due to malformed SFTP message). These vulnerabilities affect Red Hat Enterprise Linux 10 across multiple architectures. Red Hat has issued an updated libssh package (version 0.12.0-2.el10) that fixes these issues. The advisory rates the overall impact as moderate and provides detailed instructions for applying the update.
Potential Impact
The vulnerabilities can lead to denial of service conditions and potential memory corruption (buffer underflow) in applications using libssh. Improper path sanitation could lead to unexpected behavior when handling SCP paths. However, there are no reports of active exploitation in the wild. The overall security impact is moderate according to Red Hat's assessment.
Mitigation Recommendations
Red Hat has released an official security update for libssh in Red Hat Enterprise Linux 10 that addresses all listed vulnerabilities. Users should apply the updated libssh packages as described in the Red Hat advisory RHSA-2026:18160 and the linked update instructions (https://access.redhat.com/articles/11258). No additional mitigations are indicated or required beyond applying the official patch.
Red Hat Security Advisory: libssh security update
Description
Multiple vulnerabilities have been identified in libssh, a library implementing the SSH protocol used in client and server applications. These include a buffer underflow on invalid input, improper sanitation of paths from SCP servers, and several denial of service (DoS) issues related to configuration file handling, regular expression processing, and malformed SFTP messages. Red Hat has released an update for Red Hat Enterprise Linux 10 to address these issues. The security impact is rated as moderate. No known exploits are reported in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers five security vulnerabilities in libssh: CVE-2026-0964 (improper sanitation of SCP server paths), CVE-2026-0965 (DoS via improper configuration file handling), CVE-2026-0966 (buffer underflow in ssh_get_hexa()), CVE-2026-0967 (DoS via inefficient regex processing), and CVE-2026-0968 (DoS due to malformed SFTP message). These vulnerabilities affect Red Hat Enterprise Linux 10 across multiple architectures. Red Hat has issued an updated libssh package (version 0.12.0-2.el10) that fixes these issues. The advisory rates the overall impact as moderate and provides detailed instructions for applying the update.
Potential Impact
The vulnerabilities can lead to denial of service conditions and potential memory corruption (buffer underflow) in applications using libssh. Improper path sanitation could lead to unexpected behavior when handling SCP paths. However, there are no reports of active exploitation in the wild. The overall security impact is moderate according to Red Hat's assessment.
Mitigation Recommendations
Red Hat has released an official security update for libssh in Red Hat Enterprise Linux 10 that addresses all listed vulnerabilities. Users should apply the updated libssh packages as described in the Red Hat advisory RHSA-2026:18160 and the linked update instructions (https://access.redhat.com/articles/11258). No additional mitigations are indicated or required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18160
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-0965","CVE-2026-0966","CVE-2026-0967","CVE-2026-0968"]
- Cvss Version
- null
Threat ID: 6a1f4e87e29bf47b50080e50
Added to database: 6/2/2026, 9:43:35 PM
Last enriched: 6/2/2026, 10:08:56 PM
Last updated: 6/3/2026, 4:59:44 AM
Views: 2
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