CVE-2026-52909

HIGH 7.8

ip6_vti: set netns_immutable on the fallback device.

CVSS Score

7.8

EPSS Score

0.1%

EPSS Percentile

2th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Jun 19, 2026
Last Updated	Jul 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Linux / Linux

61220ab349485d911083d0b7990ccd3db6c63297 < 12acc977838c943636fb01e2f3087d2e4cc3b7cc 61220ab349485d911083d0b7990ccd3db6c63297 < 7f28e3948c59481f8db9c9638e204258d26b4e41 61220ab349485d911083d0b7990ccd3db6c63297 < 12c65e2c7fef507551bd7b52123598a761662c01 61220ab349485d911083d0b7990ccd3db6c63297 < f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3 61220ab349485d911083d0b7990ccd3db6c63297 < c5dbd669db5a426b3025512322e1bf2cdbe14305 61220ab349485d911083d0b7990ccd3db6c63297 < ecf8904067dcba0dad86ece80874841e60317885 61220ab349485d911083d0b7990ccd3db6c63297 < dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 61220ab349485d911083d0b7990ccd3db6c63297 < d289d5307762d1838aaece22c6b6fcad9e8865f9

Linux / Linux

3.15

References

NVD ↗ CVE.org ↗ EPSS Data ↗