medium6.5
CVE-2026-59843
A flaw was found in libssh.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Libssh | Libssh | All versions |
| Redhat | Hardened Images | All versions |
| Redhat | Enterprise Linux | Versions 8.0, 9.0, 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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