CVE-2026-90019
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fix null pointer dereference in usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.
Affected versions
Linux kernel versions
3.9
and later are affected. Fixed in
5.10.270,
5.15.221,
6.1.188,
6.6.157,
6.12.110,
6.18.51,
7.2.5,
7.3-rc2
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-90019?
CVE-2026-90019 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.9 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-90019 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-90019?
Yes. CVE-2026-90019 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 3.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-90019 actively exploited?
No. CVE-2026-90019 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.