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5.5
MEDIUM CVSS 3.1
CVE-2022-49709
cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle
Description

In the Linux kernel, the following vulnerability has been resolved: cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle RCU_NONIDLE usage during __cfi_slowpath_diag can result in an invalid RCU state in the cpuidle code path: WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138 ... Call trace: rcu_eqs_enter+0xe4/0x138 rcu_idle_enter+0xa8/0x100 cpuidle_enter_state+0x154/0x3a8 cpuidle_enter+0x3c/0x58 do_idle.llvm.6590768638138871020+0x1f4/0x2ec cpu_startup_entry+0x28/0x2c secondary_start_kernel+0x1b8/0x220 __secondary_switched+0x94/0x98 Instead, call rcu_irq_enter/exit to wake up RCU only when needed and disable interrupts for the entire CFI shadow/module check when we do.

INFO

Published Date :

Feb. 26, 2025, 7:01 a.m.

Last Modified :

Oct. 24, 2025, 3:53 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2022-49709 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Linux kernel to resolve RCU usage issues in the cpuidle code path.
  • Update the Linux kernel to the latest version.
  • Apply the patch for the cfi module.
  • Verify RCU state in cpuidle.
  • Test the system for stability.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2022-49709.

URL Resource
https://git.kernel.org/stable/c/57cd6d157eb479f0a8e820fd36b7240845c8a937 Patch
https://git.kernel.org/stable/c/75f3a5fa2ad049c85ab5d5ee1ed9cfaa7e62c5ed Patch
https://git.kernel.org/stable/c/ca3897f2ac02ceae5e6fa794f83c36f9885b93da Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-49709 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2022-49709 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2022-49709 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2022-49709 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Oct. 24, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.18.6 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.15.49
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/57cd6d157eb479f0a8e820fd36b7240845c8a937 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/75f3a5fa2ad049c85ab5d5ee1ed9cfaa7e62c5ed Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/ca3897f2ac02ceae5e6fa794f83c36f9885b93da Types: Patch
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 26, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle RCU_NONIDLE usage during __cfi_slowpath_diag can result in an invalid RCU state in the cpuidle code path: WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138 ... Call trace: rcu_eqs_enter+0xe4/0x138 rcu_idle_enter+0xa8/0x100 cpuidle_enter_state+0x154/0x3a8 cpuidle_enter+0x3c/0x58 do_idle.llvm.6590768638138871020+0x1f4/0x2ec cpu_startup_entry+0x28/0x2c secondary_start_kernel+0x1b8/0x220 __secondary_switched+0x94/0x98 Instead, call rcu_irq_enter/exit to wake up RCU only when needed and disable interrupts for the entire CFI shadow/module check when we do.
    Added Reference https://git.kernel.org/stable/c/57cd6d157eb479f0a8e820fd36b7240845c8a937
    Added Reference https://git.kernel.org/stable/c/75f3a5fa2ad049c85ab5d5ee1ed9cfaa7e62c5ed
    Added Reference https://git.kernel.org/stable/c/ca3897f2ac02ceae5e6fa794f83c36f9885b93da
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact