CVE-2026-64364: HID: multitouch: fix out-of-bounds bit access on mt_io_flags

mediumCVSS 5.5CVE-2026-64364

CSIRTS triage

vendor: null product: nullOther

What: An out-of-bounds bit access on mt_io_flags has been fixed in the multitouch HID driver.
Who is affected: Deployments using the multitouch HID driver are affected.
Urgency: Remediation is necessary to prevent potential exploitation, although exploitation status is currently unknown.
Action: Apply the fix for CVE-2026-64364.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64364

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-643640.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64364	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for HID

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-64427: In the Linux kernel, the following vulnerability has been resolved: HID: logitech-dj: Fix maxf…nvd · 2026-07-25
highCVE-2026-64367: In the Linux kernel, the following vulnerability has been resolved: HID: hid-goodix-spi: valid…nvd · 2026-07-25
highCVE-2026-64366: In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix slab-out-o…nvd · 2026-07-25
unknownCVE-2026-64365: In the Linux kernel, the following vulnerability has been resolved: HID: letsketch: fix UAF on…nvd · 2026-07-25
highCVE-2026-64364: In the Linux kernel, the following vulnerability has been resolved: HID: multitouch: fix out-o…nvd · 2026-07-25
unknownCVE-2026-64363: In the Linux kernel, the following vulnerability has been resolved: HID: appleir: fix UAF on p…nvd · 2026-07-25