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7.8 High

CVE-2026-52909 In the Linux kernel, the following vulnerability has been resolved: ip6_vti: set netns_immutable on the fallback device

Description

In the Linux kernel, the following vulnerability has been resolved: ip6_vti: set netns_immutable on the fallback device. john1988 and Noam Rathaus reported that vti6_init_net() does not set the netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0). Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) correctly set this flag during their fallback device initialization to prevent them from being moved to another network namespace.

Affected products and versions

Product Affected versions Fixed in
Linux 7.1 earliest → < 7.1 7.1
Linux 7.0 earliest → < 7.0.13 7.0.13
Linux 6.18 earliest → < 6.18.36 6.18.36
Linux 6.12 earliest → < 6.12.95 6.12.95
Linux 6.6 earliest → < 6.6.144 6.6.144
Linux 6.1 earliest → < 6.1.177 6.1.177
Linux 5.15 earliest → < 5.15.211 5.15.211
Linux 5.10 earliest → < 5.10.260 5.10.260
Linux 3.15 No fix stated
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Product Affected versions Fixed in
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published

References

Timeline

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