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CVE-2026-43403

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls Even privileged services should not necessarily be able to see other privileged service's namespaces so they can't leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7d0f29032d25f2794f07d4a47d7483353a64edd22e7bdbf82488622e5a623cd2
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":["fs/nsfs.c","include/linux/ns_common.h","kernel/nscommon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3376b345df155ca36d8611857b41ff7d5183fc38","status":"affected","version":"a1d220d9dafa8d76ba60a784a1016c3134e6a1e8","versionType":"git"},{"lessThan":"2f3dea284c761c890d676f77d5e55c0c496b4ef4","status":"affected","version":"a1d220d9dafa8d76ba60a784a1016c3134e6a1e8","versionType":"git"},{"lessThan":"0ad650e60150eda789deca5e78a6a09d26bf8fc9","status":"affected"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nsfs.c","include/linux/ns_common.h","kernel/nscommon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nsfs.c","include/linux/ns_common.h","kernel/nscommon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3376b345df155ca36d8611857b41ff7d5183fc38","status":"affected","version":"a1d220d9dafa8d76ba60a784a1016c3134e6a1e8","versionType":"git"},{"lessThan":"2f3dea284c761c890d676f77d5e55c0c496b4ef4","status":"affected","version":"a1d220d9dafa8d76ba60a784a1016c3134e6a1e8","versionType":"git"},{"lessThan":"0ad650e60150eda789deca5e78a6a09d26bf8fc9","status":"affected"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nsfs.c","include/linux/ns_common.h","kernel/nscommon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c0233e793d4ca9a32ec41417aeb6f0b502761020c267cc515391ab79b9b2245b · sha256:8cde181e70a83fea… · /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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