Libssh: libssh: use-after-free via data callbacks on closed channels
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.6%
exploitation probability
0.6%top 53% of all CVEs
observed exploitation
nono source reports it
A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products
Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat Hardened ImagesReferences
https://access.redhat.com/errata/RHSA-2026:42922https://access.redhat.com/errata/RHSA-2026:55855https://access.redhat.com/errata/RHSA-2026:62217https://access.redhat.com/errata/RHSA-2026:62218https://access.redhat.com/security/cve/CVE-2026-59850https://bugzilla.redhat.com/show_bug.cgi?id=2498183