CVE-2026-59845
Libssh: libssh: denial of service via unchecked proxycommand fork() failure
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in libssh. When ProxyCommand is used, an unchecked fork() failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service.
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Jul 21, 2026 |
| Last Updated | Jul 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Hardened Images
All versions affected References
Credits
Red Hat would like to thank Halil Oktay (oblivionsage) for reporting this issue.