CVE-2026-56113
Medium · 5.3CVSS
5.3
EPSS
0.3%
Published
Jun 23, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-109618 PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort… CWE-416
- CVE-2026-109619 PHP has various global state that temporarily points into request memory. CWE-416
- CVE-2026-112402 Pillow is a Python imaging library. CWE-416
- CVE-2026-112396 Pillow is a Python imaging library. CWE-416
- CVE-2025-55654 A use-after-free in the gf_filter_pid_get_packet function (filter_core/filter_pid.c) of… CWE-416
- CVE-2026-17591 A flaw was found in libarchive. CWE-416
- CVE-2026-92392 During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with… CWE-416
- CVE-2026-109268 ImageMagick before 6.9.13-57 and 7.x before 7.1.2-32 contains a use after free… CWE-416