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ip6_vti: set netns_immutable on the fallback device.

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-52909

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-52909

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "12acc977838c943636fb01e2f3087d2e4cc3b7cc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "7f28e3948c59481f8db9c9638e204258d26b4e41",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "12c65e2c7fef507551bd7b52123598a761662c01",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "c5dbd669db5a426b3025512322e1bf2cdbe14305",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "ecf8904067dcba0dad86ece80874841e60317885",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "dcdce3bc9f08026ff3739ee7339e1bef526fc5f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61220ab349485d911083d0b7990ccd3db6c63297",
        "lessThan": "d289d5307762d1838aaece22c6b6fcad9e8865f9",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ipv6/ip6_vti.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.260",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.211",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.177",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.144",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.36",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.13",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv6/ip6_vti.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-52909

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40686 · Revision 1
Added to Heist Feed
Publisher date
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