Description
The decode_search function in dhcp.c in dhcpcd 3.x allows remote DHCP servers to cause a denial of service (out-of-bounds write) via a crafted response.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dhcpcd | 1:10.0.1-1 | — |
| Debian 13 | dhcpcd | 1:10.0.1-1 | — |
| Debian 7 | dhcpcd | 1:3.2.3-11+deb7u1 | DSA-3534-1 |
| Debian 6.0 | dhcpcd | 1:3.2.3-5+squeeze2 | DLA-362-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | dhcpcd | 3.2.3-45.5.3 | SUSE-SU-2015:2174-1 |
| SLES 11 SP3 | dhcpcd | 3.2.3-45.5.3 | SUSE-SU-2015:2174-1 |
| SLES 11 SP2 | dhcpcd | 3.2.3-45.5.3 | SUSE-SU-2015:2174-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | dhcpcd | 3.2.3-45.5.3 | SUSE-SU-2015:2174-1 |
| SLES for SAP 11 SP3 | dhcpcd | 3.2.3-45.5.3 | SUSE-SU-2015:2174-1 |
Advisories 3
- DLA-362-1 dhcpcd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3534-1 dhcpcd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:2174-1 Security update for dhcpcd SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://bugs.launchpad.net/ubuntu/+source/dhcpcd/+bug/1517226
- [oss-security] 20151202 CVE Request: dhcpcd 3.x, potentially other versions too mailing-list
- https://launchpadlibrarian.net/228152582/dhcp.c.patch
- DSA-3534 vendor-advisory
- [oss-security] 20151203 Re: CVE Request: dhcpcd 3.x, potentially other versions too mailing-list