DEBIAN-CVE-2026-56113
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-56113
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56113.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-56113
- Upstream
- Published
- 2026-06-23T17:17:09Z
- Modified
- 2026-09-14T17:03:20Z
- 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
Debian:13 / dhcpcd
Package
- Name
- dhcpcd
- Purl
- pkg:deb/debian/dhcpcd?arch=source&distro=trixie
Debian:14 / dhcpcd
Package
- Name
- dhcpcd
- Purl
- pkg:deb/debian/dhcpcd?arch=source&distro=forky
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed1:10.3.2-4
Affected versions
1:10.*
1:10.1.0-11
1:10.1.0-12
1:10.2.0-1
1:10.2.2-1
1:10.2.2-2
1:10.2.2-3
1:10.2.2-4
1:10.2.2-5
1:10.2.2-6
1:10.2.3-1
1:10.2.4-1
1:10.2.4-2
1:10.2.4-3
1:10.2.4-4~bpo13+1
1:10.2.4-4
1:10.3.0-1
1:10.3.0-2~bpo13+1
1:10.3.0-2
1:10.3.0-3~bpo13+1
1:10.3.0-3
1:10.3.0-4
1:10.3.0-5
1:10.3.0-6
1:10.3.0-7~bpo13+1
1:10.3.0-7
1:10.3.1-1~bpo13+1
1:10.3.1-1
1:10.3.1-2
1:10.3.1-3
1:10.3.1-4
1:10.3.1-5~bpo13+1
1:10.3.1-5
1:10.3.2-1
1:10.3.2-2
1:10.3.2-3~bpo13+1
1:10.3.2-3
1:10.3.2-4~bpo13+1