What is CVE-2026-59850?

CVE-2026-59850 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Use After Free. CVSS score: 4.3/10. Published 2026-07-21.

How severe is CVE-2026-59850?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Use After Free in Red Hat Enterprise Linux 10

CVE-2026-59850

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.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images

Weakness classification (CWE)

CWE-416 — Use After Free

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-59850?: CVE-2026-59850 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Use After Free. CVSS score: 4.3/10. Published 2026-07-21.
How severe is CVE-2026-59850?: Medium severity. CVSS v3 base score is 4.3 out of 10.