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THREAT OPS › Threat News › [NVD] CVE-2026-63803 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: hdlc_ppp: sync per-proto timers before freeing hdlc state Each PPP control protocol (LCP/IPCP/IPV6CP) embedded in struct ppp registers a timer via timer_setup(). That struct ppp is the hdlc->state allocation, w

[NVD] CVE-2026-63803 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: hdlc_ppp: sync per-proto timers before freeing hdlc state Each PPP control protocol (LCP/IPCP/IPV6CP) embedded in struct ppp registers a timer via timer_setup(). That struct ppp is the hdlc->state allocation, w

mednvdPublished 2026-07-19

CVE-2026-63803 CVSS: 7.8 HIGH Published: 2026-07-19T12:16:52.980

In the Linux kernel, the following vulnerability has been resolved:

hdlc_ppp: sync per-proto timers before freeing hdlc state

Each PPP control protocol (LCP/IPCP/IPV6CP) embedded in struct ppp registers a timer via timer_setup(). That struct ppp is the hdlc->state allocation, which detach_hdlc_protocol() frees with kfree() in both

Indicators of compromise

CVE-2026-63803cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-63803