Description
An integer underflow was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c does not verify that the IP total length field (ip_len) is at least as large as the IP header length (ihl) before subtracting the header length. An unauthenticated attacker on the same network can thereby trigger an out-of-bounds read past the receive buffer in the wicked DHCPv4 client (wickedd-dhcp4), which can crash the daemon depending on the process memory layout. No information disclosure has been demonstrated. This issue affects wicked up to and including version 0.6.80.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SUSE | wicked | ≤ 0.6.80 | — |
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | wicked | 0.6.79-150700.3.8.1 | SUSE-SU-2026:3841-1 |
| SLES 15 SP6 | wicked | 0.6.79-150600.11.20.1 | SUSE-SU-2026:3840-1 |
| SLES 15 SP5 | wicked | 0.6.79-150500.3.47.1 | SUSE-SU-2026:3839-1 |
| SLES 15 SP4 | wicked | 0.6.79-150400.3.44.1 | SUSE-SU-2026:3842-1 |
| SLES 12 SP5 | wicked | 0.6.79-3.61.1 | SUSE-SU-2026:3837-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | wicked | 0.6.79-150600.11.20.1 | SUSE-SU-2026:3840-1 |
| SLES for SAP 15 SP5 | wicked | 0.6.79-150500.3.47.1 | SUSE-SU-2026:3839-1 |
| SLES for SAP 15 SP4 | wicked | 0.6.79-150400.3.44.1 | SUSE-SU-2026:3842-1 |
| SLE Micro 5.5 | wicked | 0.6.79-150500.3.47.1 | SUSE-SU-2026:3839-1 |
| SLE Micro 5.4 | wicked | 0.6.79-150400.3.44.1 | SUSE-SU-2026:3842-1 |
| SLE Micro 5.3 | wicked | 0.6.79-150400.3.44.1 | SUSE-SU-2026:3842-1 |
| SLE HPC 15 SP5 | wicked | 0.6.79-150500.3.47.1 | SUSE-SU-2026:3839-1 |
| SLE HPC 15 SP4 | wicked | 0.6.79-150400.3.44.1 | SUSE-SU-2026:3842-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | wicked | 0.6.80-2.1 | openSUSE-SU-2026:11636-1 |
| openSUSE Leap 16.0 | wicked | 0.6.80-bp160.2.1 | openSUSE-SU-2026:21669-1 |
Advisories 7
- SUSE-SU-2026:3837-1 Security update for wicked SUSE / openSUSE Security Updates · Sep 4, 2026
- SUSE-SU-2026:3839-1 Security update for wicked SUSE / openSUSE Security Updates · Sep 4, 2026
- SUSE-SU-2026:3840-1 Security update for wicked SUSE / openSUSE Security Updates · Sep 4, 2026
- SUSE-SU-2026:3841-1 Security update for wicked SUSE / openSUSE Security Updates · Sep 4, 2026
- SUSE-SU-2026:3842-1 Security update for wicked SUSE / openSUSE Security Updates · Sep 4, 2026
- openSUSE-SU-2026:11636-1 wicked-0.6.80-2.1 on GA media SUSE / openSUSE Security Updates · Aug 29, 2026
- openSUSE-SU-2026:21669-1 Security update for wicked SUSE / openSUSE Security Updates · Aug 28, 2026