CVE-2026-43390 (GCVE-0-2026-43390)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-08 14:21
VLAI?
Title
nstree: tighten permission checks for listing
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
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"status": "unaffected",
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},
{
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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]
}
],
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}
],
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"url": "https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"
},
{
"url": "https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361"
}
],
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"cveId": "CVE-2026-43390",
"datePublished": "2026-05-08T14:21:35.337Z",
"dateReserved": "2026-05-01T14:12:56.007Z",
"dateUpdated": "2026-05-08T14:21:35.337Z",
"state": "PUBLISHED"
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"date": "2026-05-09",
"epss": "0.00018",
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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