Vulnerability Details CVE-2026-59842
A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small amounts of server memory.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 39.9%
CVSS Severity
CVSS v3 Score 3.7
References
Products affected by CVE-2026-59842
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cpe:2.3:a:libssh:libssh:0.12.0
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cpe:2.3:a:redhat:hardened_images:-
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cpe:2.3:o:redhat:enterprise_linux:10.0
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cpe:2.3:o:redhat:enterprise_linux:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.0
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.0
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:10.2