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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-52909

⇱ NVD - CVE-2026-52909

  1. Vulnerabilities

CVE-2026-52909 Detail

Received

This CVE record has recently been published to the CVE List and has been included within the NVD dataset.

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.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9 kernel.org
https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 kernel.org
https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

CVE Modified by kernel.org 6/28/2026 4:16:22 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

New CVE Received from kernel.org 6/19/2026 11:16:35 AM

Action Type Old Value New Value
Added 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.
Added Reference 
https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9
Added Reference 
https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3
Added Reference 
https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885
Added Affected 
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"61220ab349485d911083d0b7990ccd3db6c63297","lessThan":"ecf8904067dcba0dad86ece80874841e60317885","versionType":"git","status":"affected"},{"version":"61220ab349485d911083d0b7990ccd3db6c63297","lessThan":"dcdce3bc9f08026ff3739ee7339e1bef526fc5f3","versionType":"git","status":"affected"},{"version":"61220ab349485d911083d0b7990ccd3db6c63297","lessThan":"d289d5307762d1838aaece22c6b6fcad9e8865f9","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.15","status":"affected"},{"version":"0","lessThan":"3.15","versionType":"semver","status":"unaffected"},{"version":"6.18.36","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.13","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-52909
NVD Published Date:
06/19/2026
NVD Last Modified:
06/28/2026
Source:
kernel.org