Linux Kernel up to 6.18.1 exfat exfat_allocate_bitmap divide by zero

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.18.1. Affected by this vulnerability is the function exfat_allocate_bitmap of the component exfat. The manipulation results in divide by zero. This vulnerability is known as CVE-2025-68350. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.1. It has been classified as critical. Affected is the function exfat_allocate_bitmap of the component exfat. The manipulation with an unknown input leads to a divide by zero vulnerability. CWE is classifying the issue as CWE-369. The product divides a value by zero. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: exfat: fix divide-by-zero in exfat_allocate_bitmap The variable max_ra_count can be 0 in exfat_allocate_bitmap(), which causes a divide-by-zero error in the subsequent modulo operation (i % max_ra_count), leading to a system crash. When max_ra_count is 0, it means that readahead is not used. This patch load the bitmap without readahead.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-68350 since 12/16/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 280001 (Linux Distros Unpatched Vulnerability : CVE-2025-68350), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.2 or 6.19-rc1 eliminates this vulnerability. Applying the patch 88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44/d70a5804c563b5e34825353ba9927509df709651 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (280001) and CERT Bund (WID-SEC-2025-2920). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Linux Kernel

Productinfo

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Vendor

Name

Version

License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 280001
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-68350

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.2/6.19-rc1
Patch: 88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44/d70a5804c563b5e34825353ba9927509df709651

Timelineinfo

12/16/2025 CVE reserved
12/24/2025 +8 days Advisory disclosed
12/24/2025 +0 days VulDB entry created
12/27/2025 +3 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68350 (🔒)
GCVE (CVE): GCVE-0-2025-68350
GCVE (VulDB): GCVE-100-337920
CERT Bund: WID-SEC-2025-2920 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 14:07
Updated: 12/27/2025 22:03
Changes: 12/24/2025 14:07 (59), 12/25/2025 12:30 (7), 12/27/2025 22:03 (2)
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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