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CVE-2026-53263: 6lowpan: fix off-by-one in multicast context address compression

mediumCVSS 5.5CVE-2026-53263

CSIRTS triage

vendor: Linuxproduct: 6lowpanOther
What
An off-by-one error exists in multicast context address compression.
Who is affected
Users of the 6lowpan driver are affected.
Urgency
Remediation is medium urgency due to a CVSS score of 5.5.
Action
Update the driver to the latest version that includes the fix.

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
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53263

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-53263coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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