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CVE-2026-43391

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for handle opening 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:v2:1743d3e7a377d6b9ef723c063041ae95501b69fc8a6faf3597d163755e467e0b
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":"affected","product":"Linux","programFiles":["fs/nsfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nsfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1797ee11451f1b2be69863a9f5bd43b948813fdf","status":"affected","version":"5222470b2fbb3740f931f189db33dd1367b1ae75","versionType":"git"},{"lessThan":"d2324a9317f00013facb0ba00b00440e19d2af5e","status":"affected","version":"5222470b2fbb3740f931f189db33dd1367b1ae75","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nsfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nsfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1797ee11451f1b2be69863a9f5bd43b948813fdf","status":"affected","version":"5222470b2fbb3740f931f189db33dd1367b1ae75","versionType":"git"},{"lessThan":"d2324a9317f00013facb0ba00b00440e19d2af5e","status":"affected","version":"5222470b2fbb3740f931f189db33dd1367b1ae75","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/affected/0

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:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24cc9b53bd3ebd9c58ff1d1b9d35d5bd3cfc64e2ce62821a9939eea3883852dc · sha256:02c47cf0142d1a05… · /containers/cna/references/1

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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