Description (CNA)
A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:0.12.0-3.el10_2 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-17.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-17.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-19.el9_8 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-19.el9_8 before * |
| Red Hat / Red Hat Hardened Images | unaffected 0.12.1-4.hum1 before * |
CWE
CWE-835
References
- https://access.redhat.com/errata/RHSA-2026:42922
- https://access.redhat.com/errata/RHSA-2026:55855
- https://access.redhat.com/errata/RHSA-2026:62217
- https://access.redhat.com/errata/RHSA-2026:62218
- https://access.redhat.com/security/cve/CVE-2026-59843
- https://bugzilla.redhat.com/show_bug.cgi?id=2498176
ADP enrichment
No English description supplied.
No references supplied.