CVE-2026-59850 Details
Description
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.
A use-after-free vulnerability has been identified in libssh. The issue arises when data packets are processed after a channel has been closed, allowing channel data callbacks to be invoked after the associated data has been freed. This can lead to crashes or potential use-after-free conditions, where previously freed memory is accessed, possibly causing memory corruption or unauthorized code execution.
Users are advised to manually verify that channels are not closed before processing data in channel data callbacks.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 21, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libssh libssh | All versions |
CPE
Remediation
| |
| redhat hardened images | All versions |
CPE
Remediation
| |
| redhat enterprise linux | 8.0 9.0 10.0 |
CPE
Remediation
| |
Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 1, 2026 | CVE Modified | [email protected] |
| Sep 1, 2026 | CVE Modified | [email protected] |
| Aug 17, 2026 | CVE Modified | [email protected] |
| Jul 30, 2026 | Initial Analysis | [email protected] |
| Jul 22, 2026 | CVE Modified | [email protected] |
| Jul 21, 2026 | CVE Modified | [email protected] |
| Jul 21, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |