CVE-2026-64452: 6lowpan: fix NHC entry use-after-free on error path

mediumCVSS 5.5CVE-2026-64452

CSIRTS triage

Other

What: The vulnerability addresses a use-after-free issue on the error path in the 6lowpan subsystem.
Who is affected: Deployments using the 6lowpan subsystem.
Urgency: Remediation is important to prevent potential crashes, with no known exploits at this time.
Action: Implement the fix for the use-after-free issue in the 6lowpan subsystem.

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-2026-64452

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-2026-644520.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64452	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-64452: In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix NHC entry use…nvd

Recent advisories for 6lowpan

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-2026-64452: In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix NHC entry use…nvd · 2026-07-25
unknownCVE-2026-63991: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: check …nvd · 2026-07-19
highCVE-2026-63870: In the Linux kernel, the following vulnerability has been resolved: ieee802154: 6lowpan: only …nvd · 2026-07-19
mediumCVE-2026-53263: 6lowpan: fix off-by-one in multicast context address compressionmsrc · 2026-06-09