Description
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.
CVSS 5.3EPSS 0.17500000000000002%Risque 0.54
Voir la source- Publication
- 2026-06-23 17:17:09
- Versions concernées
- <10.3.2
- Type
- Micrologiciel
- Vecteur
- CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H