CVE-2026-52909
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < 12acc977838c943636fb01e2f3087d2e4cc3b7cc | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < 7f28e3948c59481f8db9c9638e204258d26b4e41 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < 12c65e2c7fef507551bd7b52123598a761662c01 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < c5dbd669db5a426b3025512322e1bf2cdbe14305 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < ecf8904067dcba0dad86ece80874841e60317885 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 | affected |
| Linux | Linux | 61220ab349485d911083d0b7990ccd3db6c63297 < d289d5307762d1838aaece22c6b6fcad9e8865f9 | affected |
| Linux | Linux | 3.15 | affected |
| Linux | Linux | 0 < 3.15 | unaffected |
| Linux | Linux | 5.10.260 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.211 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.177 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.144 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.95 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.36 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.13 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc
- https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41
- https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01
- https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3
- https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305
- https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885
- https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3
- https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9
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