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Vulnerability Database · Debian · libssh2 · Version

libssh2 1.9.0-2 deb11u1

1.9.0-2 deb11u1 is affected by 10 vulnerabilities.

The vulnerabilities that cover this exact version are listed below with the fixed version to move to.

Critical 0 High 2 Medium 2 Low 0 Unrated 6

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Database updated 23/Oct/2026

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01 Vulnerabilities affecting this version

libssh2 1.9.0-2 deb11u1 vulnerabilities

10 vulnerabilities cover libssh2 1.9.0-2 deb11u1. Open the full list in the database.

Vulnerability Severity Fixed version Disclosed
Integer Overflow Vulnerability in libssh2: CVE-2026-7598 7.3 high No fix published 01 May 2026
Heap Buffer Overflow in libssh2 Due to Attribute Count Mismanagement 7.0 high No fix published 28 Jun 2026
Critical Vulnerability in libssh2: Uninitialized Memory Exposure 6.5 medium No fix published 28 Jun 2026
Out-of-Bounds Heap Read Vulnerability in libssh2: CVE-2025-15661 6.5 medium No fix published 18 Jun 2026
Double-Free Vulnerability in libssh2 Affects SFTP Sessions N/A unrated No fix published 24 Jul 2026
Heap Buffer Overflow in libssh2: A Critical Vulnerability N/A unrated No fix published 24 Jul 2026
Critical Integer Underflow Vulnerability in libssh2 Affects Multiple Debian Releases N/A unrated No fix published 24 Jul 2026
Critical Heap Out-of-Bounds Read in libssh2 - CVE-2026-66034 N/A unrated No fix published 24 Jul 2026
Denial of Service Vulnerability in libssh2: Pre-authentication CPU Exhaustion Risk N/A unrated No fix published 17 Jun 2026
Out-of-Bounds Write Vulnerability in libssh2 Leading to Remote Code Execution N/A unrated No fix published 17 Jun 2026

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Questions

About libssh2 1.9.0-2 deb11u1

Is libssh2 1.9.0-2 deb11u1 vulnerable?

Yes. 10 vulnerabilities in the Vulert database cover libssh2 1.9.0-2 deb11u1: 0 critical, 2 high, 2 medium and 0 low, plus 6 not yet rated. Each entry above names the fixed version to move to.

How do I monitor libssh2 for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the libssh2 version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.