CVE-2021-47002

SUNRPC: Fix null pointer dereference in svc_rqst_free()

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the
null rq_scratch_page pointer will be dereferenced when calling
put_page() in svc_rqst_free(). Fix it by adding a null check. Addresses-Coverity: ("Dereference after null check")

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: SUNRPC: corrige la desreferencia del puntero nulo en svc_rqst_free() Cuando alloc_pages_node() devuelve nulo en svc_rqst_alloc(), el puntero nulo rq_scratch_page será desreferenciado al llamar a put_page() en svc_rqst_free(). Solucionarlo agregando una marca nula. Direcciones-Cobertura: ("Desreferencia después de verificación nula")

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check. Addresses-Coverity: ("Dereference after null check")

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-27 CVE Reserved
2024-02-28 CVE Published
2025-05-04 CVE Updated
2025-07-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source
https://git.kernel.org/stable/c/79e4e0d489c8e72b9efa388e504a036eec1550c6	Vuln. Introduced
https://git.kernel.org/stable/c/5191955d6fc65e6d4efe8f4f10a6028298f57281	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/3de81c1e84bf84803308da3272a829a7655c5336	2024-07-05
https://git.kernel.org/stable/c/1e10f58f1c9a6b667b045513c7a4e6111c24fe7c	2021-05-19
https://git.kernel.org/stable/c/c664aaec9aee544538a78ba4893a44bc73a6d742	2021-05-19
https://git.kernel.org/stable/c/b9f83ffaa0c096b4c832a43964fe6bff3acffe10	2021-04-23

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.10.220 < 5.10.221 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.220 < 5.10.221"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.11.22 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.11.22"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.12.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.12.5"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.13"		en		Affected