CVE Watch14 jul 2026

CVE-2026-56113

dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unauthenticated same-link attackers

CVSS

5.3

Medio

EPSS

0.3%

p19

KEV

—

Exploit Today

0-100

Publicado: 23 jun 2026 · Última mod.: 14 jul 2026 · CWE-416

EPSS · 30d

0.2%EPSS · 30 días0.3%

2026-08-042026-08-31

Descripción técnica

dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unauthenticated same-link attackers to crash the daemon by sending a crafted DHCPv6 RENEW reply with RFC6603 OPTION_PD_EXCLUDE and both preferred and valid lifetimes set to zero. Attackers acting as or impersonating a DHCPv6 server can trigger dhcp6_deprecatedele() to free a delegated child address while an outer TAILQ_FOREACH_SAFE iterator in dhcp6_deprecateaddrs() still holds the freed pointer, causing a use-after-free when TAILQ_REMOVE is reached.

Referencias oficiales

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