Out-of-bounds Write 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-17660684
- published27 Jun 2026
- disclosed23 Jun 2026
- creditUnknown
Introduced: 23 Jun 2026
CVE-2026-56115 (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 Out-of-bounds Write via the dhcp6_makemessage function. An attacker can corrupt adjacent stack memory by sending a crafted DHCPv6 ADVERTISE message containing an IA_PD IAPREFIX /0 with a valid OPTION_PD_EXCLUDE using an exclude prefix length of /121 through /128, which causes serialization of an oversized RFC6603 OPTION_PD_EXCLUDE option body.