CVE-2021-47006

ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook

Severity Score

5.5

*CVSS v3.1

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: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default
::overflow_handler()") set a default event->overflow_handler in
perf_event_alloc(), and replace the check event->overflow_handler with
is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result,
enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ARM: 9064/1: hw_breakpoint: no comprobar directamente el gancho overflow_handler del evento. el commit 1879445dfa7b ("perf/core: establecer el valor predeterminado del evento ::overflow_handler()") establece un valor predeterminado event->overflow_handler en perf_event_alloc(), y reemplace check event->overflow_handler con is_default_overflow_handler(), pero falta uno. Actualmente, bp->overflow_handler no puede ser NULL. Como resultado, enable_single_step() no siempre se invoca. Comentarios de Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/

In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/

*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
2024-12-19 CVE Updated
2025-03-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (9)

URL	Tag	Source
https://git.kernel.org/stable/c/1879445dfa7bbd6fe21b09c5cc72f4934798afed	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac	2021-05-22
https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6	2021-05-22
https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb	2021-05-22
https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80	2021-05-19
https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de	2021-05-19
https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366	2021-05-19
https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25	2021-05-19
https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260	2021-03-25

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"				>= 4.7 < 4.9.269 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.9.269"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 4.14.233 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.14.233"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 4.19.191 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.19.191"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.4.120 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.4.120"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.10.38 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.10.38"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.11.22 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.11.22"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.12.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.12.5"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.13"		en		Affected