Bug 2540538 (CVE-2026-93826) - CVE-2026-93826 kernel: HID: hidpp: fix potential UAF in hidpp_connect_event()
Summary: CVE-2026-93826 kernel: HID: hidpp: fix potential UAF in hidpp_connect_event()
Keywords:
Status: NEW
Alias: CVE-2026-93826
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-24 17:09 UTC by OSIDB Bzimport
Modified: 2026-09-28 15:50 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-24 17:09:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

HID: hidpp: fix potential UAF in hidpp_connect_event()

If input_register_device() fails, we call input_free_device(), but keep
stale pointer to the old device in hidpp->input, which could potentially
lead to UAF. Fix that by resetting it to NULL before returning from
hidpp_connect_event().
Comment 1 Mauro Matteo Cascella 2026-09-28 15:44:42 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93826.mbox
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