CVE-2026-98742
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Serialize compat port-info ioctls The native sequencer ioctl path serializes handler calls with client->ioctl_mutex, but the translated port-info compat path invokes the same handlers through snd_seq_kernel_client_ctl() without taking that mutex. This lets concurrent compat CREATE_PORT requests pass the port-count check before any request reaches the serialized insertion. The computed integer port index can then exceed the address field range and wrap to an existing index. Subsequent subscriber teardown can resolve the duplicate address to the wrong port and access a freed subscriber. Take ioctl_mutex while dispatching converted port-info requests, matching the native ioctl path. All translated port-info commands share this helper, so their accesses to the client port state are serialized as well.
Affected versions
Linux kernel versions
3.2.99,
3.16.54,
3.18.94,
4.1.50,
4.4.115,
4.9.78,
4.14.15,
4.15
and later are affected. Fixed in
6.12.113,
6.18.56,
7.2.10,
7.3
and their respective stable series.
References
4 totalFrequently asked questions
-
What is CVE-2026-98742?
CVE-2026-98742 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.2.99 onward and has been patched in 6.12.113, 6.18.56, 7.2.10 and others. CVE-2026-98742 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-98742?
Yes. CVE-2026-98742 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.10 and others. If you are running Linux kernel 3.2.99 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-98742 actively exploited?
No. CVE-2026-98742 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.