Linux Kernel 6.2 drivers/mtd/ubi/cdev.c do_div divide by zero

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel 6.2. This issue affects the function do_div of the file drivers/mtd/ubi/cdev.c. Such manipulation leads to divide by zero. This vulnerability is traded as CVE-2023-31085. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel 6.2 (Operating System) and classified as problematic. Affected by this issue is the function do_div of the file drivers/mtd/ubi/cdev.c. The manipulation with an unknown input leads to a divide by zero vulnerability. Using CWE to declare the problem leads to CWE-369. The product divides a value by zero. Impacted is availability. CVE summarizes:

An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2. There is a divide-by-zero error in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0.

The weakness was shared 04/24/2023. The advisory is shared for download at lore.kernel.org. This vulnerability is handled as CVE-2023-31085 since 04/24/2023. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/29/2025).

The vulnerability scanner Nessus provides a plugin with the ID 271767 (Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (271767). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 271767
Nessus Name: Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/24/2023 🔍
04/24/2023 +0 days 🔍
04/24/2023 +0 days 🔍
10/29/2025 +919 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lore.kernel.org
Status: Confirmed

CVE: CVE-2023-31085 (🔍)
GCVE (CVE): GCVE-0-2023-31085
GCVE (VulDB): GCVE-100-227264

Entryinfo

Created: 04/24/2023 10:34
Updated: 10/29/2025 04:25
Changes: 04/24/2023 10:34 (40), 05/18/2023 09:26 (11), 10/29/2025 04:25 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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