CVE-2026-43403
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.