CVE•Published 2026-07-19•Modified 2026-07-30•1 article on news•5 live references•NVD data
CVE-2026-63993
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
41
Exploit Prediction Scoring System · top 59% of all CVEs
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() skb_tunnel_check_pmtu() can change skb->head. Reusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF. Use instead ip_hdr(skb) as done in drivers/net/bareudp.c and drivers/net/geneve.c. Found by Sashiko.
Timeline
Published 2026-07-19
Modified 2026-07-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-63993Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-63993Censys host search filtered to this CVE id.
grep.app
CVE-2026-63993Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-63993GitHub code search for direct mentions.
Google dork
"CVE-2026-63993" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-63993 on GitHub.