What is CVE-2026-63803?

CVE-2026-63803 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. hdlc_ppp: sync per-proto timers before freeing hdlc state

Which CVE IDs does CVE-2026-63803 cover?

CVE-2026-63803 covers the following CVE IDs: CVE-2026-63803. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-63803?

CVE-2026-63803 has a CVSS v3 base score of 8.4, published by Microsoft Security Response Center (MSRC).

CVE-2026-63803HighCVSS 8.4

hdlc_ppp: sync per-proto timers before freeing hdlc state

Vendor

Microsoft Security Response Center (MSRC)

Published

July 23, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-63803 →