CVE-2026-64345: usb: gadget: f_printer: take kref only for successful open

mediumCVSS 5.5CVE-2026-64345

CSIRTS triage

Other

What: A kref should only be taken for successful open in f_printer.
Who is affected: Users of the usb gadget f_printer.
Urgency: Remediation urgency is unclear due to unknown severity.
Action: Monitor for updates regarding this issue.

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

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-2026-64345

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-2026-643450.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64345	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-64345: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: ta…nvd

Recent advisories for usb

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.

lowCVE-2026-18000: Insufficient policy enforcement in USB in Google Chrome on Android prior to 151.0.7922.72 allo…nvd · 2026-07-30
highCVE-2026-17868: Insufficient policy enforcement in USB in Google Chrome prior to 151.0.7922.72 allowed a remot…nvd · 2026-07-30
mediumCVE-2026-13307: Autel MaxiCharger AC Elite Home USB Heap-based Buffer Overflow Arbitrary Code Execution Vulner…nvd · 2026-07-29
mediumCVE-2026-13306: Autel MaxiCharger AC Elite Home USB Authentication Bypass Vulnerability. This vulnerability al…nvd · 2026-07-29
highCVE-2026-64547: In the Linux kernel, the following vulnerability has been resolved: net: usb: net1080: validat…nvd · 2026-07-27
unknownCVE-2026-64505: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: function: rnd…nvd · 2026-07-25