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 information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0ad650e60150eda789deca5e78a6a09d26bf8fc9	Patch
https://git.kernel.org/stable/c/2f3dea284c761c890d676f77d5e55c0c496b4ef4	Patch
https://git.kernel.org/stable/c/3376b345df155ca36d8611857b41ff7d5183fc38	Patch
https://git.kernel.org/stable/c/e6b899f08066e744f89df16ceb782e06868bd148	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::

History

11 Nov 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: nsfs: endurecer las comprobaciones de permisos para las ioctls de iteración de ns Incluso los servicios privilegiados no deberían necesariamente poder ver los espacios de nombres de otros servicios privilegiados para que no puedan filtrar información entre sí. Usar el asistente may_see_all_namespaces() que centraliza esta política hasta que el nstree se adapte.

Information

Published : 2026-05-08 15:16

Updated : 2026-11-11 20:10

NVD link : CVE-2026-43403

Mitre link : CVE-2026-43403

CVE.ORG link : CVE-2026-43403

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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Use may_see_all_namespaces() helper that centralizes this policy\nuntil the nstree adapts."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnsfs: endurecer las comprobaciones de permisos para las ioctls de iteraci\u00f3n de ns\n\nIncluso los servicios privilegiados no deber\u00edan necesariamente poder ver los espacios de nombres de otros servicios privilegiados para que no puedan filtrar informaci\u00f3n entre s\u00ed. Usar el asistente may_see_all_namespaces() que centraliza esta pol\u00edtica hasta que el nstree se adapte."}], "lastModified": "2026-11-11T20:10:00.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF16B1DB-0D79-4F76-8B3C-57C79AB99F70", "versionEndExcluding": "6.12.78", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E5571059-6552-48E7-9BEF-3E358C387171", "versionEndExcluding": "6.18.20", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9", "versionEndExcluding": "6.19.9", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}