CVE-2026-90019 is a vulnerability in Linux Kernel
Published on September 16, 2026
usb: gadget: fix null pointer dereference in usb_put_function_instance()
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.
Products Associated with CVE-2026-90019
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Affected Versions
Linux:- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 0fc54a00954f9f4c3e3d4ffa64a530685d99a39b is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 6e6736c049683380f5e20becde498986e9293ca4 is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 3a9691fff79bcce95338435599df6d3ae433cfdc is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 7a4f4ca7ff32ae24807c83e2a06d62b13378d53c is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0 is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below d3a7fa61997db3bf6dadef4c1bd87a4fa782a817 is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 5117f236e9e30744338b425395d55913c4500897 is affected.
- Version 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 and below 6e74ac5c596fd246e37eadfc354567179ccbe9aa is affected.
- Version 3.9 is affected.
- Before 3.9 is unaffected.
- Version 5.10.270, <= 5.10.* is unaffected.
- Version 5.15.221, <= 5.15.* is unaffected.
- Version 6.1.188, <= 6.1.* is unaffected.
- Version 6.6.157, <= 6.6.* is unaffected.
- Version 6.12.110, <= 6.12.* is unaffected.
- Version 6.18.51, <= 6.18.* is unaffected.
- Version 7.2.5, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.