ALPINE-CVE-2026-56113
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-56113
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-56113.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-56113
- Upstream
- Published
- 2026-06-23T17:17:09Z
- Modified
- 2026-09-10T08:30:02Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Alpine:v3.23 / dhcpcd
Package
- Name
- dhcpcd
- Purl
- pkg:apk/alpine/dhcpcd?arch=source