CVE-2026-52909

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc	Patch
https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01	Patch
https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41	Patch
https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305	Patch
https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9	Patch
https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3	Patch
https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885	Patch
https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc5::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc6::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc7::::::

History

No history.

Information

Published : 2026-06-19 15:16

Updated : 2026-07-08 15:24

NVD link : CVE-2026-52909

Mitre link : CVE-2026-52909

CVE.ORG link : CVE-2026-52909

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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the\nnetns_immutable flag on the per-netns fallback tunnel device (ip6_vti0).\n\nOther similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel)\ncorrectly set this flag during their fallback device initialization to\nprevent them from being moved to another network namespace."}], "lastModified": "2026-07-08T15:24:17.873", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A607EC6A-B5CC-42BB-B74C-7191E7210452", "versionEndExcluding": "5.10.260", "versionStartIncluding": "3.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D71C101E-388C-4A46-BD99-49049F7C5CFF", "versionEndExcluding": "5.15.211", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "333C9E30-7FD4-46A2-94EF-C1AA1F3EE28B", "versionEndExcluding": "6.1.177", 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