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5.5
MEDIUM CVSS 3.1
CVE-2025-21793
Linux Kernel SPI Division By Zero Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor commands, both dummy bus cycle bytes and width are zero. Because of the cpu's warning when divided by zero, the warning should be avoided. Return just zero to avoid such calculations.

INFO

Published Date :

Feb. 27, 2025, 3:15 a.m.

Last Modified :

Feb. 27, 2025, 3:15 a.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2025-21793 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
Fix division by zero in the spi-nor driver to prevent crashes.
  • Apply the kernel patch to fix the division by zero.
  • Update the Linux kernel to the latest secure version.
  • Recompile the kernel with the provided fix.
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-2025-21793.

URL Resource
https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c
https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b
https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55
https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-21793 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-2025-21793 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-2025-21793 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-2025-21793 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]

    Mar. 05, 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 CWE-369
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 from (excluding) 6.13.4 *cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 from (excluding) 6.6.79 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 from (excluding) 6.12.16
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679 Types: Patch
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 27, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor commands, both dummy bus cycle bytes and width are zero. Because of the cpu's warning when divided by zero, the warning should be avoided. Return just zero to avoid such calculations.
    Added Reference https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c
    Added Reference https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b
    Added Reference https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55
    Added Reference https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679
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