ip6_vti: set netns_immutable on the fallback device.

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-52909
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-19 15:16:35 UTC
Updated2026-07-08 15:24:17 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001200000 probability, percentile 0.021970000 (date 2026-07-09)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 12acc977838c943636fb01e2f3087d2e4cc3b7cc git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 7f28e3948c59481f8db9c9638e204258d26b4e41 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 12c65e2c7fef507551bd7b52123598a761662c01 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 c5dbd669db5a426b3025512322e1bf2cdbe14305 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 ecf8904067dcba0dad86ece80874841e60317885 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 git Not specified
CNA Linux Linux affected 61220ab349485d911083d0b7990ccd3db6c63297 d289d5307762d1838aaece22c6b6fcad9e8865f9 git Not specified
CNA Linux Linux affected 3.15 Not specified
CNA Linux Linux unaffected 3.15 semver Not specified
CNA Linux Linux unaffected 5.10.260 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.211 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.177 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.144 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.95 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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