CVE-2024-56768

bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP
disabled can trigger the following bug, as pcpu_hot is unavailable: [ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c [ 8.471849] #PF: supervisor read access in kernel mode [ 8.471881] #PF: error_code(0x0000) - not-present page Fix by inlining a return 0 in the !CONFIG_SMP case.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Corregir bpf_get_smp_processor_id() en !CONFIG_SMP En x86-64, llamar a bpf_get_smp_processor_id() en un kernel con CONFIG_SMP deshabilitado puede provocar el siguiente error, ya que pcpu_hot no está disponible: [ 8.471774] ERROR: no se puede gestionar el error de página para la dirección: 00000000936a290c [ 8.471849] #PF: acceso de lectura de supervisor en modo kernel [ 8.471881] #PF: error_code(0x0000) - página no presente Corregir incrustando un retorno 0 en el caso de !CONFIG_SMP.

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP disabled can trigger the following bug, as pcpu_hot is unavailable: [ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c [ 8.471849] #PF: supervisor read access in kernel mode [ 8.471881] #PF: error_code(0x0000) - not-present page Fix by inlining a return 0 in the !CONFIG_SMP case.

*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

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-12-29 CVE Reserved
2025-01-06 CVE Published
2025-01-06 CVE Updated
2025-01-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (3)

URL	Tag	Source
https://git.kernel.org/stable/c/1ae6921009e5d72787e07ccc04754514ccf6bc99	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/f4ab7d74247b0150547cf909b3f6f24ee85183df	2025-01-02
https://git.kernel.org/stable/c/23579010cf0a12476e96a5f1acdf78a9c5843657	2024-12-18

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"				>= 6.10 < 6.12.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.10 < 6.12.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.10 < 6.13-rc4 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.10 < 6.13-rc4"		en		Affected