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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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0af7becc4569bab827f2c747006cfe5aa418f083ff308e86086c8c356985dc1b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"12acc977838c943636fb01e2f3087d2e4cc3b7cc","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"7f28e3948c59481f8db9c9638e204258d26b4e41","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"12c65e2c7fef507551bd7b52123598a761662c01","status":"affected","version":"61220ab349485d911083d0b7990…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.260","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.211","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.177","versionType":"semver"},{"lessThanOr…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"12acc977838c943636fb01e2f3087d2e4cc3b7cc","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"7f28e3948c59481f8db9c9638e204258d26b4e41","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"12c65e2c7fef507551bd7b52123598a761662c01","status":"affected","version":"61220ab349485d911083d0b7990…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.260","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.211","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.177","versionType":"semver"},{"lessThanOr…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:da107b38d6e89b2d7b19e66fceff7f599afd18f4fa2f148ad8178a8eb46baec8 · sha256:d4295279c0cc59fb… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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