CVE-2026-43391nsfs: tighten permission checks for handle opening
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: 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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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
- Modified
- Record last updated
- Sep 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 5222470b2fbb3740f931f189db33dd1367b1ae75 builds before 24ebaf6676ae4f74f4856eb645959b15e62bc1b4; 5222470b2fbb3740f931f189db33dd1367b1ae75 builds before 1797ee11451f1b2be69863a9f5bd43b948813fdf; from 5222470b2fbb3740f931f189db33dd1367b1ae75 before d2324a9317f00013facb0ba00b00440e19d2af5e | CNA record |
linux linux_kernel linux:linux_kernel | from 6.18 before 6.19.9; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/24ebaf6676ae4f74f4856eb645959b15e62bc1b4
- https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdfpatch
- https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5epatch
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.