openSUSE-SU-2026:21220-1: moderate: Security update for dhcpcd

openSUSE security update: security update for dhcpcd
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21220-1
Rating: moderate
References:

  * bsc#1268761



Cross-References:

  * CVE-2025-70102



CVSS scores:

  * CVE-2025-70102 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-70102 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves one vulnerability and has one bug fix can now be installed.

Description:

This update for dhcpcd fixes the following issue

Update to 10.3.2:

- CVE-2025-70102: NULL pointer dereference in `parse_option()` when processing a specially crafted configuration input
  (bsc#1268761).

Changes for dhcpcd:

 * options: Ensure ldop is not NULL dereferenced
 * DHCP: Don't run double EXPIRE hooks on carrier loss
 * DHCP: free the state when dropping on state NONE
 * BSD: don't send uninitialised memory using
 ps_root_indirectioctl
 * Fix fallback_time option
 * IPv4: Ignore DHCP state when building routes
 * route: Routes may not have an interface assinged
 * options: Ensure that an overly long bitflag string does not
 crash
 * options: Don't assume vsio options have an argument
 * common: Cast via uintptr_t rather than unsigned long in UNCONST
 * privsep: Ensure we recv for real after a successful recv
 MSG_PEEK
 * DHCP: Add parentheses to macro definitions
 * ipv6nd: empty IPV6RA_EXPIRE eloop queue when dropping
 * privsep: enforce message boundaries with MSG_EOR on our
 messages
 * Protocols will notify when dhcpcd can exit
 * DHCP: Don't request T1 and T2
 * DHCP: Don't request a lease time
 * DHCP6: Don't exit if using DHCP4 INFORM in non manager mode
 * ND: Route Information Option prefix is optional
 * ipv6: respect slaac hwaddr to really use the hwaddr
 * When stopping all interfaces at exit and releasing,
 remove persistance
 * NetBSD: Delete RTF_CONNECTED route when changing it
 * privsep: Drain the log when the root process is exiting
 * eloop: vastly reworked, kqueue and epoll support on by default


Patch instructions:

   To install this openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-1147=1

Package List:

- openSUSE Leap 16.0:

  dhcpcd-10.3.2-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2025-70102.html