UpHeron
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Servers and applications

CVE-2006-5051

Signal handler race condition in OpenSSH before 4.4 allows remote attackers to cause a denial of service (crash), and possibly execute arbitrary code if GSSAPI authentication is enabled, via unspecified vectors that lead to a double-free.

Severity
High 8.1
Published
27 Sept 2006
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
46% in the next 30 daysHigher than 98% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Double free (CWE-415)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Every version up to 4.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2006-5051
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2006-5051