CVE-2026-43390nstree: tighten permission checks for listing
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 76b6f5dfb3fda76fce1f9990d6fa58adc711122b builds before 0abd81645fc95ec6a9d4e4813000f22c5efc0ff4; 76b6f5dfb3fda76fce1f9990d6fa58adc711122b builds before 8d76afe84fa2babf604b3c173730d4d2b067e361 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.19 before 6.19.9; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4patch
- https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.