CVE-2026-59843

ADVISORY - nist

Summary

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.

EPSS Score⁠: 0.00526 (0.425)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-400⁠

Uncontrolled Resource Consumption

CWE-835⁠

Loop with Unreachable Exit Condition ('Infinite Loop')

Impacted images

Advisories

NIST

CREATED

1 month ago

UPDATED

1 day ago

ADVISORY IDCVE-2026-59843⁠

EXPLOITABILITY SCORE

2.8

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)

CWE-400⁠CWE-835⁠

CVSS SCORE

6.5medium

Alpine

CREATED

1 month ago

UPDATED

29 days ago

ADVISORY IDCVE-2026-59843⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

RATING UNAVAILABLE FROM ADVISORY

Debian

CREATED

1 month ago

UPDATED

2 hours ago

ADVISORY IDCVE-2026-59843⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

RATING UNAVAILABLE FROM ADVISORY

Ubuntu

CREATED

1 month ago

UPDATED

2 days ago

ADVISORY IDCVE-2026-59843⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Alma

CREATED

2 days ago

UPDATED

17 hours ago

ADVISORY IDALSA-2026:62217⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Alma

CREATED

2 days ago

UPDATED

17 hours ago

ADVISORY IDALSA-2026:62218⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Red Hat

CREATED

1 month ago

UPDATED

1 month ago

ADVISORY IDCVE-2026-59843⁠

EXPLOITABILITY SCORE

2.8

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

6.5medium

Rocky

CREATED

16 days ago

UPDATED

15 days ago

ADVISORY IDRLSA-2026:55855⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Ahigh

Rocky

CREATED

20 hours ago

UPDATED

18 hours ago

ADVISORY IDRLSA-2026:62217⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Alow

Rocky

CREATED

20 hours ago

UPDATED

18 hours ago

ADVISORY IDRLSA-2026:62218⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Alow

Oracle

CREATED

17 days ago

UPDATED

17 days ago

ADVISORY IDELSA-2026-55855⁠

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Ahigh

Chainguard

CREATED

22 days ago

UPDATED

22 days ago

ADVISORY ID

CGA-w8m5-5c9r-4r59

EXPLOITABILITY SCORE

EXPLOITS FOUND

COMMON WEAKNESS ENUMERATION (CWE)-

RATING UNAVAILABLE FROM ADVISORY