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CVE

DEBIAN-CVE-2026-63993

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.
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CVE

DEBIAN-CVE-2026-63993

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.

In the Linux kernel, the following vulnerability has been resolved:  vxlan: do not reuse cached iphdr() value after skbtunnelcheckpmtu()  skbtunnelcheckpmtu() can change skb->head.  Reusing oldiph afer skbtunnelcheckpmtu() can cause an UAF.  Use instead iphdr(skb) as done in drivers/net/bareudp.c and drivers/net/geneve.c.  Found by Sashiko.

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-2026-63993

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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