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Medium DSA-5251-1 2 CVEs

isc-dhcp - security update

Published Oct 6, 2022 · Updated Mar 9, 2026

Ecosystem: Debian

Fixed packages 1

ReleasePackageFixed in
Debian · 11 isc-dhcp 4.4.1-2.3+deb11u1

Vulnerabilities 2

  • Medium 6.5
    CVE-2022-2928

    An option refcount overflow exists in dhcpd

    In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decreme…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 6.5
    CVE-2022-2929

    DHCP memory leak

    In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine