Libssh: libssh: denial of service via unchecked proxycommand fork() failure (Red Hat Red Hat Enterprise Linux 10)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.10 % · percentile 1 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-390 — Detection of Error Condition Without Action
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H | redhat |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-46178
- GCVE · GCVE-0-2026-59845
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:libssh:libssh:-:*:*:*:*:*:*:*cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Enterprise Linux 10 | unaffected 0:0.12.0-3.el10_2 < * |
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-17.el8_10 < * |
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-17.el8_10 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-19.el9_8 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-19.el9_8 < * |
| Red Hat · Red Hat Hardened Images | unaffected 0.12.1-4.hum1 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |