Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12, < 6.12.78 |
References
- https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9Patch
- https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4Patch
- https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38Patch
- https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148Patch
FAQ
What is CVE-2026-43403?
CVE-2026-43403 is a vulnerability with a CVSS score of 8.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls Even privileged services should not necessarily be able to see other privi...
How severe is CVE-2026-43403?
CVE-2026-43403 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43403?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.