illumos illumos-gate Door Interface door_if.c nwamd_door_switch null pointer dereference

Summaryinfo

A vulnerability, which was classified as problematic, has been found in illumos illumos-gate. This vulnerability affects the function nwamd_door_switch of the file usr/src/cmd/cmd-inet/lib/nwamd/door_if.c of the component Door Interface. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2026-104114. The attack must be carried out locally. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in illumos illumos-gate (affected version unknown) and classified as problematic. This issue affects the function nwamd_door_switch of the file usr/src/cmd/cmd-inet/lib/nwamd/door_if.c of the component Door Interface. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

A NULL pointer dereference in the illumos Network Auto-Magic daemon (nwamd) allows a local user to crash the daemon. nwamd_door_switch() in usr/src/cmd/cmd-inet/lib/nwamd/door_if.c writes to the caller's request structure before checking that a request was supplied, and before checking the caller's credentials. Because the nwamd door at /etc/svc/volatile/nwam/nwam_door is accessible to all local users, an unprivileged user can issue a door_call() with no argument data to crash nwamd; repeated calls place the svc:/network/physical:nwam service into maintenance, stopping automatic network configuration. nwamd runs only when svc:/network/physical:nwam is enabled, which is not the default. The flaw has existed since 2010 (illumos-gate commit 6ba597c5), and affects any illumos distribution prior to illumos-gate commit 0f1064d9.

The advisory is shared at illumos.topicbox.com. The identification of this vulnerability is CVE-2026-104114 since 10/01/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

It is declared as proof-of-concept.

Applying the patch 0f1064d97f1a43778ddf87d4e438b99872aed1a0 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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Vendor

• illumos

Name

• illumos-gate

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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