Riskcovery

CVE-2026-72249

netfilter: flowtable: use dst in this direction when pushing IPIP header

State
Published
Severity
9.8 Critical
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: flowtable: use dst in this direction when pushing IPIP header

When pushing the IPIP header, the route of the other direction is used to calculate the headroom, use the route in this direction. Accessing the other tuple to set the IP source and destination is fine because this tuple does not provide such information to avoid storing redundant information. However, this tuple already provides the dst for this direction, this went unnoticed because this bug affects headroom and iph->frag_off only at this stage.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • d30301ba4b07ac92eb38353a111833b009003170 to before ecb78fbb03d3f86e2e93767875e273308086a424Affected
  • d30301ba4b07ac92eb38353a111833b009003170 to before c328b90c17fc5fa7786503695152880b2afb9326Affected
LinuxLinux
  • 6.19Affected
  • before 6.19Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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