CVE
DEBIAN-CVE-2026-63992
In the Linux kernel, the following vulnerability has been resolved: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() In some cases, iptunnel_pmtud_check_icmp() can be called wh...
In the Linux kernel, the following vulnerability has been resolved: tunnels: do not assume transport header in iptunnelpmtudcheckicmp() In some cases, iptunnelpmtudcheckicmp() can be called while skb transport header is not set. This triggers an out-of-bound access, because (typeof(skb->transportheader))~0U is 65535. Access the icmp header based on IPv4 network header, after making sure icmp->type is present in skb linear part. Note that iptunnelpmtudcheckicmpv6()) is fine.
Package Versions Affected
Package Version
patch Availability
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
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C
H
U
0
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3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
C
H
U
-
Related Resources
No items found.
References
https://security-tracker.debian.org/tracker/CVE-2026-63992