Bug 2482538 (CVE-2026-46232)

Summary: CVE-2026-46232 kernel: HID: playstation: Clamp num_touch_reports
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Human Interface Device (HID) PlayStation driver. A malicious device could provide an excessively large number of touch reports, leading to an out-of-bounds read in the `dualshock4_parse_report` function. This could allow an attacker to read up to 2 KiB of kernel memory, potentially leading to information disclosure.
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Description OSIDB Bzimport 2026-05-28 11:02:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

HID: playstation: Clamp num_touch_reports

A device would never lie about the number of touch reports would it?

If it does the loop in dualshock4_parse_report will read off the end of
the touch_reports array, up to about 2 KiB for the maximum number of 256
loop iteraions. The data that is read is emitted via evdev if the
DS4_TOUCH_POINT_INACTIVE bit happens to be set. Protect against this by
clamping the num_touch_reports value provided by the device to the
maximum size of the touch_reports array.
Comment 1 Keith Grant 2026-05-28 12:22:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052839-CVE-2026-46232-58cb@gregkh/T