Linux Kernel up to 7.2-rc3 libertas helper_firmware_cb memory leak

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k1.05+

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc3. Affected by this vulnerability is the function helper_firmware_cb of the component libertas. Performing a manipulation results in memory leak. This vulnerability was named CVE-2026-68410. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc3. This affects the function helper_firmware_cb of the component libertas. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix memory leak in helper_firmware_cb() helper_firmware_cb() neglects to free the single-stage firmware image after a successful async load, leading to a memory leak in the USB firmware-download path. Fix this memory leak by calling release_firmware() immediately after lbs_fw_loaded() returns. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in the current wireless tree. An x86_64 allyesconfig build showed no new warnings. As we do not have compatible Libertas USB hardware for exercising this firmware-download path, no runtime testing was able to be performed.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-68410 since 07/30/2026. The exploitability is told to be easy. Attacking locally is a requirement. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc4 eliminates this vulnerability. Applying the patch d497b7566e74920acfe283dd6b2cbf1682890796/eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c/6cda91bbb8dc3d22ef0323008a12dcf73a5129da/644640cde2fb216e6567de5eee780a38dbc95928/63c2391deefb31e1b801b7f32bd502ca4808639b is able to eliminate this problem.

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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: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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
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 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc4
Patch: d497b7566e74920acfe283dd6b2cbf1682890796/eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c/6cda91bbb8dc3d22ef0323008a12dcf73a5129da/644640cde2fb216e6567de5eee780a38dbc95928/63c2391deefb31e1b801b7f32bd502ca4808639b

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68410 (🔒)
GCVE (CVE): GCVE-0-2026-68410
GCVE (VulDB): GCVE-100-387783

Entryinfo

Created: 08/10/2026 18:44
Changes: 08/10/2026 18:44 (59)
Complete: 🔍
Cache ID: 216::103

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