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CVE-2026-43390

In the Linux kernel, the following vulnerability has been resolved: nstree: tighten permission checks for listing 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:a9e26851c784a1af25678df05bacc579e38603534f26f9cf8f31f27b610431c8
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":["kernel/nstree.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","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:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/nstree.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0abd81645fc95ec6a9d4e4813000f22c5efc0ff4","status":"affected","version":"76b6f5dfb3fda76fce1f9990d6fa58adc711122b","versionType":"git"},{"lessThan":"8d76afe84fa2babf604b3c173730d4d2b067e361","status":"affected","version":"76b6f5dfb3fda76fce1f9990d6fa58adc711122b","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/nstree.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","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:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/nstree.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0abd81645fc95ec6a9d4e4813000f22c5efc0ff4","status":"affected","version":"76b6f5dfb3fda76fce1f9990d6fa58adc711122b","versionType":"git"},{"lessThan":"8d76afe84fa2babf604b3c173730d4d2b067e361","status":"affected","version":"76b6f5dfb3fda76fce1f9990d6fa58adc711122b","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /containers/cna/affected/0

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:25678f380275c488b7cf9314c6d5abecec2f1f9bcfbdbcd41a14a6e7ea11fa61 · sha256:fdffd0bb43a8357c… · /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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