Description
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.
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Remediation
Vendor Workaround
No workaround available.
Tracking
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Advisories
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References
History
Tue, 21 Jul 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-400 | |
| Metrics |
ssvc
|
Tue, 21 Jul 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Libssh: libssh: denial of service via zero advertised channel packet size | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird |
|
| CPEs | cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-07-21T12:08:28.113Z
Reserved: 2026-07-07T15:40:24.561Z
Link: CVE-2026-59843
Updated: 2026-07-21T12:05:43.803Z
No data.
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OpenCVE Enrichment
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Weaknesses