CVE-2026-52909ip6_vti: set netns_immutable on the fallback device.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 61220ab349485d911083d0b7990ccd3db6c63297 builds before 12acc977838c943636fb01e2f3087d2e4cc3b7cc; 61220ab349485d911083d0b7990ccd3db6c63297 builds before 7f28e3948c59481f8db9c9638e204258d26b4e41; 61220ab349485d911083d0b7990ccd3db6c63297 builds before 12c65e2c7fef507551bd7b52123598a761662c01; from 61220ab349485d911083d0b7990ccd3db6c63297 before f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3; from 61220ab349485d911083d0b7990ccd3db6c63297 before c5dbd669db5a426b3025512322e1bf2cdbe14305; from 61220ab349485d911083d0b7990ccd3db6c63297 before ecf8904067dcba0dad86ece80874841e60317885; from 61220ab349485d911083d0b7990ccd3db6c63297 before dcdce3bc9f08026ff3739ee7339e1bef526fc5f3; from 61220ab349485d911083d0b7990ccd3db6c63297 before d289d5307762d1838aaece22c6b6fcad9e8865f9 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.15 before 5.10.260; from 5.11 before 5.15.211; from 5.16 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7ccpatch
- https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41patch
- https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01patch
- https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3patch
- https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305patch
- https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885patch
- https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3patch
- https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.