Use-After-Free Vulnerability in libssh Affects Red Hat Products
CVE-2026-59850

4.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images
Vendor
CVE Published:
21 July 2026

What is CVE-2026-59850?

A vulnerability in the libssh library allows for potential mishandling of data packets. If data packets are processed after a channel has been closed, it can trigger callbacks for channel data that may reference data that has already been deallocated. This flaw can lead to application crashes or exploitation scenarios, posing significant risks to system integrity.

References

https://access.redhat.com/security/cve/CVE-2026-59850
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2498183
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Zhou Qingyang for reporting this issue.
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