Use After Free The advisory has been revoked - it doesn't affect any version of package libssh (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-LIBSSH-18147955
- published22 Jul 2026
- disclosed21 Jul 2026
Introduced: 21 Jul 2026
CVE-2026-59850 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by RHEL.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2498183
- https://access.redhat.com/security/cve/CVE-2026-59850
- https://access.redhat.com/errata/RHSA-2026:42922
- https://access.redhat.com/errata/RHSA-2026:55855
- https://access.redhat.com/errata/RHSA-2026:62218
- https://access.redhat.com/errata/RHSA-2026:62217