CVE-2026-3731libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds

Beschreibung

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• VDB-349709 | libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
• VDB-349709 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-requiredPermissions RequiredVDB Entry
• Submit #767120 | libssh.org libssh libssh < 0.11.4; < 0.12.0 Out-of-Bounds Read third-party-advisoryThird Party AdvisoryVDB Entry
• https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt relatedProduct
• https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60 patchPatch
• https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz patchPatchThird Party Advisory