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CVE

DEBIAN-CVE-2026-63994

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() an...
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CVE

DEBIAN-CVE-2026-63994

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() an...

In the Linux kernel, the following vulnerability has been resolved:  tunnels: load network headers after skbcow() in iptunnelpmtudbuildicmp[v6]()  Sashiko found that iptunnelpmtudbuildicmp() and iptunnelpmtudbuildicmpv6() were caching iphdr() and ipv6hdr() before an skbcow() call which can reallocate skb->head.  Fix this possible UAF by initializing the local variables after the skbcow() call.  Remove skbresetnetwork_header() calls which were not needed.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
-
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://security-tracker.debian.org/tracker/CVE-2026-63994

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
0
Fix Available
6.1.176-1,6.12.94-1,7.0.12-1

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