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7.8
HIGH CVSS 3.1
CVE-2024-38667
riscv: prevent pt_regs corruption for secondary idle threads
Description

In the Linux kernel, the following vulnerability has been resolved: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.

INFO

Published Date :

June 24, 2024, 2:15 p.m.

Last Modified :

May 30, 2025, 7:30 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2024-38667 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 HIGH [email protected]
Solution
A vulnerability in the Linux kernel requires updating the kernel to resolve the issue.
  • Update the Linux kernel to a patched version.
  • Reboot the system after the update.
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-2024-38667.

URL Resource
https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 Mailing List Patch
https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Patch
https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Patch
https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Patch
https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 Mailing List Patch
https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Patch
https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Patch
https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e 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-2024-38667 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-2024-38667 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-2024-38667 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-2024-38667 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.

  • Modified Analysis by [email protected]

    May. 30, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.7 *cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.9 up to (excluding) 6.9.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1 up to (excluding) 6.1.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.33 OR *cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (excluding) 6.1.93
    Changed Reference Type kernel.org: https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Types: Mailing List, Patch kernel.org: https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Types: Patch
    Changed Reference Type CVE: https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Types: Mailing List, Patch CVE: https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Types: Patch
    Changed Reference Type kernel.org: https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Types: Mailing List, Patch kernel.org: https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Types: Patch
    Changed Reference Type CVE: https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Types: Mailing List, Patch CVE: https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Types: Patch
    Changed Reference Type kernel.org: https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Types: Mailing List, Patch kernel.org: https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Types: Patch
    Changed Reference Type CVE: https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Types: Mailing List, Patch CVE: https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Types: Patch
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80
    Added Reference https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44
    Added Reference https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af
    Added Reference https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e
  • Initial Analysis by [email protected]

    Jun. 26, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 No Types Assigned https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 Mailing List, Patch
    Changed Reference Type https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 No Types Assigned https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 Mailing List, Patch
    Changed Reference Type https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af No Types Assigned https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af Mailing List, Patch
    Changed Reference Type https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e No Types Assigned https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e Mailing List, Patch
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1 up to (excluding) 6.1.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.9 up to (excluding) 6.9.4 *cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:*
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 24, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.
    Added Reference kernel.org https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af [No types assigned]
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: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact