Amazon Linux 2023 Security Advisory: ALAS2023-2026-1759
Advisory Released Date: 2026-06-08
Advisory Updated Date: 2026-06-08
Severity:
Medium
Issue Overview:
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. (CVE-2026-3731)
Affected Packages:
libssh
Issue Correction:
Run dnf update libssh --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1759 --releasever 2023.12.20260608 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
libssh-debugsource-0.10.6-1.amzn2023.0.7.aarch64
libssh-debuginfo-0.10.6-1.amzn2023.0.7.aarch64
libssh-0.10.6-1.amzn2023.0.7.aarch64
libssh-devel-0.10.6-1.amzn2023.0.7.aarch64
noarch:
libssh-config-0.10.6-1.amzn2023.0.7.noarch
src:
libssh-0.10.6-1.amzn2023.0.7.src
x86_64:
libssh-debugsource-0.10.6-1.amzn2023.0.7.x86_64
libssh-debuginfo-0.10.6-1.amzn2023.0.7.x86_64
libssh-0.10.6-1.amzn2023.0.7.x86_64
libssh-devel-0.10.6-1.amzn2023.0.7.x86_64