CVE-2023-52791

CVE Details

Release Date:

2024-05-21

Description

In the Linux kernel, the following vulnerability has been resolved:\ni2c: core: Run atomic i2c xfer when !preemptible\nSince bae1d3a05a8b, i2c transfers are non-atomic if preemption is\ndisabled. However, non-atomic i2c transfers require preemption (e.g. in\nwait_for_completion() while waiting for the DMA).\npanic() calls preempt_disable_notrace() before calling\nemergency_restart(). Therefore, if an i2c device is used for the\nrestart, the xfer should be atomic. This avoids warnings like:\n[ 12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0\n[ 12.676926] Voluntary context switch within RCU read-side critical section!\n...\n[ 12.742376] schedule_timeout from wait_for_completion_timeout+0x90/0x114\n[ 12.749179] wait_for_completion_timeout from tegra_i2c_wait_completion+0x40/0x70\n...\n[ 12.994527] atomic_notifier_call_chain from machine_restart+0x34/0x58\n[ 13.001050] machine_restart from panic+0x2a8/0x32c\nUse !preemptible() instead, which is basically the same check as\npre-v5.2.

See more information about CVE-2023-52791 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14