CVE-2026-43210

In the Linux kernel, the following vulnerability has been resolved: tracing: ring-buffer: Fix to check event length before using Check the event length before adding it for accessing next index in rb_read_data_buffer(). Since this function is used for validating possibly broken ring buffers, the length of the event could be broken. In that case, the new event (e + len) can point a wrong address. To avoid invalid memory access at boot, check whether the length of each event is in the possible range before using it.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac	Patch
https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a	Patch
https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e	Patch
https://git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982	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::::::::

History

11 Nov 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: tracing: ring-buffer: Corrección para verificar la longitud del evento antes de usarlo Verificar la longitud del evento antes de añadirlo para acceder al siguiente índice en rb_read_data_buffer(). Dado que esta función se utiliza para validar búferes de anillo posiblemente corruptos, la longitud del evento podría estar corrupta. En ese caso, el nuevo evento (e + len) puede apuntar a una dirección incorrecta. Para evitar accesos a memoria no válidos durante el arranque, verificar si la longitud de cada evento está dentro del rango posible antes de usarlo.

Information

Published : 2026-05-06 12:16

Updated : 2026-11-11 20:10

NVD link : CVE-2026-43210

Mitre link : CVE-2026-43210

CVE.ORG link : CVE-2026-43210

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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Since this function is used for validating\npossibly broken ring buffers, the length of the event could be broken.\nIn that case, the new event (e + len) can point a wrong address.\nTo avoid invalid memory access at boot, check whether the length of\neach event is in the possible range before using it."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntracing: ring-buffer: Correcci\u00f3n para verificar la longitud del evento antes de usarlo\n\nVerificar la longitud del evento antes de a\u00f1adirlo para acceder al siguiente \u00edndice en rb_read_data_buffer(). Dado que esta funci\u00f3n se utiliza para validar b\u00faferes de anillo posiblemente corruptos, la longitud del evento podr\u00eda estar corrupta. En ese caso, el nuevo evento (e + len) puede apuntar a una direcci\u00f3n incorrecta. Para evitar accesos a memoria no v\u00e1lidos durante el arranque, verificar si la longitud de cada evento est\u00e1 dentro del rango posible antes de usarlo."}], "lastModified": "2026-11-11T20:10:00.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "91F4DDF8-DCB5-433F-9A96-EB7DD49CF8DB", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}