Linux Kernel up to 7.2.4 Zoran zoran_exit_video_devices video_dev double free

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.50/7.2.4. Affected by this vulnerability is the function zoran_exit_video_devices of the component Zoran. This manipulation of the argument video_dev causes double free. This vulnerability is handled as CVE-2026-89870. It is possible to launch the attack on the local host. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.50/7.2.4. It has been declared as very critical. Affected by this vulnerability is the function zoran_exit_video_devices of the component Zoran. The manipulation of the argument video_dev with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: media: zoran: Avoid freeing a registered video_device twice zoran_init_video_device() installs zoran_vdev_release() as the video_device release callback through zoran_template. After video_register_device() succeeds, video_unregister_device() drops the registered video_device reference and the V4L2 core eventually invokes that release callback, which kfree()s the video_device. zoran_exit_video_devices() called video_unregister_device() and then kfree(zr->video_dev), so device teardown could free the same video_device twice. Remove the direct kfree() and clear the cached pointer after unregistering. The pre-registration failure path keeps its manual free because the video_device was not registered there. This issue was found by a static analysis checker and confirmed by manual source review.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-89870 since 09/11/2026. The exploitation appears to be easy. Attacking locally is a requirement. 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. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/16/2026).

Upgrading to version 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch 3ad6cf27505017a6794f5f96c31218c2291e951b/c4acac8cdc005b2d14b6cef5e215d264212857f3/4d99d8d0d895489064783601a516bd45812fa992/f1c4f3885df1f09bcab5296d86834d104f865e86/672dbccf4351370dad002d3c78dbb29ca1588f22/0735e0b5a96761a9ce277a238e834008ad92a0a5 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
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: Double free
CWE: CWE-415 / CWE-119
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 6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: 3ad6cf27505017a6794f5f96c31218c2291e951b/c4acac8cdc005b2d14b6cef5e215d264212857f3/4d99d8d0d895489064783601a516bd45812fa992/f1c4f3885df1f09bcab5296d86834d104f865e86/672dbccf4351370dad002d3c78dbb29ca1588f22/0735e0b5a96761a9ce277a238e834008ad92a0a5

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89870 (🔒)
GCVE (CVE): GCVE-0-2026-89870
GCVE (VulDB): GCVE-100-405691

Entryinfo

Created: 09/16/2026 13:52
Changes: 09/16/2026 13:52 (60)
Complete: 🔍
Cache ID: 216::103

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