CVE-2021-47368
Enetc Linux Kernel Memory Access Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: enetc: Fix illegal access when reading affinity_hint irq_set_affinity_hit() stores a reference to the cpumask_t parameter in the irq descriptor, and that reference can be accessed later from irq_affinity_hint_proc_show(). Since the cpu_mask parameter passed to irq_set_affinity_hit() has only temporary storage (it's on the stack memory), later accesses to it are illegal. Thus reads from the corresponding procfs affinity_hint file can result in paging request oops. The issue is fixed by the get_cpu_mask() helper, which provides a permanent storage for the cpumask_t parameter.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
April 2, 2025, 2:53 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.8
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-2021-47368.
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-2021-47368 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47368 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.
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Initial Analysis by [email protected]
Apr. 02, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.70 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.1 up to (excluding) 5.4.150 Added Reference Type CVE: https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90 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/4c4c3052911b577920353a7646e4883d5da40c28 Added Reference https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b Added Reference https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270 Added Reference https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-400 Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: enetc: Fix illegal access when reading affinity_hint irq_set_affinity_hit() stores a reference to the cpumask_t parameter in the irq descriptor, and that reference can be accessed later from irq_affinity_hint_proc_show(). Since the cpu_mask parameter passed to irq_set_affinity_hit() has only temporary storage (it's on the stack memory), later accesses to it are illegal. Thus reads from the corresponding procfs affinity_hint file can result in paging request oops. The issue is fixed by the get_cpu_mask() helper, which provides a permanent storage for the cpumask_t parameter. Added Reference kernel.org https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47368 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-2021-47368
weaknesses.