CVE-2026-64060: netfs: Fix leak of request in netfs_write_begin() error handling

mediumCVSS 5.5CVE-2026-64060

CSIRTS triage

Other

What: This issue involves a leak of requests in error handling during netfs write operations.
Who is affected: Deployments using the netfs feature in affected versions.
Urgency: Remediation is necessary due to medium severity, though exploitation is not currently reported.
Action: Update to the latest version of netfs to resolve 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-2026-64060

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-2026-640600.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64060	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highUSN-8618-1: Linux kernel vulnerabilitiesubuntu
highUSN-8603-1: Linux kernel (Azure) vulnerabilitiesubuntu
highUSN-8593-1: Linux kernel vulnerabilitiesubuntu
unknownCVE-2026-64060: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix leak of request…nvd

Recent advisories for netfs

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.

highCVE-2026-64217: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check i…nvd · 2026-07-24
criticalCVE-2026-64216: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential UAF i…nvd · 2026-07-24
criticalCVE-2026-64160: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential for t…nvd · 2026-07-19
unknownCVE-2026-64159: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix zeropoint updat…nvd · 2026-07-19
highCVE-2026-64158: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix write streaming…nvd · 2026-07-19
unknownCVE-2026-64157: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix partial invalid…nvd · 2026-07-19