news.mlab.sh
Vulnerabilities
Vulnerability

CVE-2026-63994

Reference data from vuln.mlab.sh, coverage from our own index.

CVSS
9.8 Critical
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.51%
Risk score
40.9
Published
2026-07-19
Status
Published

In the Linux kernel, the following vulnerability has been resolved: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head. Fix this possible UAF by initializing the local variables after the skb_cow() call. Remove skb_reset_network_header() calls which were not needed.

Coverage 6

Advisories and references