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CVE-2026-59843

🗓️ 21 Jul 2026 11:16:12Reported by redhatType 
cve
 cve
🔗 web.nvd.nist.gov👁 8 Views

Libssh suffers denial of service via zero packet size in SSH_MSG_CHANNEL_OPEN.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-59843
21 Jul 202611:16
attackerkb
Cvelist
CVE-2026-59843 Libssh: libssh: denial of service via zero advertised channel packet size
21 Jul 202611:16
cvelist
Debian CVE
CVE-2026-59843
21 Jul 202611:16
debiancve
EUVD
EUVD-2026-46177
21 Jul 202611:16
euvd
NVD
CVE-2026-59843
21 Jul 202612:18
nvd
OSV
DEBIAN-CVE-2026-59843
21 Jul 202612:48
osv
Positive Technologies
PT-2026-61858
21 Jul 202600:00
ptsecurity
RedhatCVE
CVE-2026-59843
21 Jul 202611:11
redhatcve
Vulnrichment
CVE-2026-59843 Libssh: libssh: denial of service via zero advertised channel packet size
21 Jul 202611:16
vulnrichment
[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:10"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Hardened Images",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:hummingbird:1"
    ]
  }
]

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21 Jul 2026 18:31Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.16.5
SSVC
8