Linux Kernel up to 6.18.13/6.19.3 gpib ni_usb_init memory leak

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

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.13/6.19.3 and classified as critical. This vulnerability affects the function ni_usb_init of the component gpib. The manipulation leads to memory leak. This vulnerability is referenced as CVE-2026-45939. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.13/6.19.3 and classified as critical. This issue affects the function ni_usb_init of the component gpib. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: gpib: Fix memory leak in ni_usb_init() In ni_usb_init(), if ni_usb_setup_init() fails, the function returns -EFAULT without freeing the allocated writes buffer, leading to a memory leak. Additionally, ni_usb_setup_init() returns 0 on failure, which causes ni_usb_init() to return -EFAULT, an inappropriate error code for this situation. Fix the leak by freeing writes in the error path. Modify ni_usb_setup_init() to return -EINVAL on failure and propagate this error code in ni_usb_init().

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-45939 since 05/13/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.18.14 or 6.19.4 eliminates this vulnerability. Applying the patch 9c97fcfb7a62dea893104a046d544da8ac23370b/c899d4b62c0757a280831e89c1f3801b597e8f38/b89921eed8cf2d97250bac4be38dbcfbf048b586 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.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.14/6.19.4
Patch: 9c97fcfb7a62dea893104a046d544da8ac23370b/c899d4b62c0757a280831e89c1f3801b597e8f38/b89921eed8cf2d97250bac4be38dbcfbf048b586

Timelineinfo

05/13/2026 CVE reserved
05/27/2026 +14 days Advisory disclosed
05/27/2026 +0 days VulDB entry created
06/25/2026 +28 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-45939 (🔒)
GCVE (CVE): GCVE-0-2026-45939
GCVE (VulDB): GCVE-100-366215

Entryinfo

Created: 05/27/2026 17:14
Updated: 06/25/2026 00:57
Changes: 05/27/2026 17:14 (59), 06/25/2026 00:57 (10)
Complete: 🔍
Cache ID: 216::103

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