Use After Free Affecting rsmarples/dhcpcd package, versions [0,10.5.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-RSMARPLESDHCPCD-17660683
- published27 Jun 2026
- disclosed23 Jun 2026
- creditUnknown
Introduced: 23 Jun 2026
CVE-2026-56113 (opens in a new tab)How to fix?
Upgrade rsmarples/dhcpcd to version 10.5.0 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free via the dhcp6_deprecateaddrs process when handling a crafted DHCPv6 RENEW reply containing RFC6603 OPTION_PD_EXCLUDE with both preferred and valid lifetimes set to zero. An attacker can cause the daemon to crash by sending such a reply from the same network link, exploiting the freed memory pointer during address deprecation.