Linux Kernel up to 6.18.49/7.2.3 ipu7 ipu7-isys.c isys_probe use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.41+

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.49/7.2.3 and classified as very critical. This issue affects the function isys_probe of the file drivers/media/pci/ipu3/ipu7-isys.c of the component ipu7. The manipulation leads to use after free. This vulnerability is listed as CVE-2026-89522. The attack must be carried out locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 6.18.49/7.2.3. This issue affects the function isys_probe of the file drivers/media/pci/ipu3/ipu7-isys.c of the component ipu7. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: media: staging/ipu7: fix async notifier UAF on probe error path isys_register_devices() registers the V4L2 async notifier via isys_notifier_init(). If a subsequent probe step such as isys_fw_log_init() fails, isys_probe() jumps to the out_cleanup label which only calls isys_unregister_devices(). That helper tears down the video devices, subdevices, V4L2 device and media device, but never unregisters or cleans up the async notifier. As a result the notifier stays chained in the global notifier_list while the enclosing struct ipu7_isys is freed by devres, leading to list corruption and a use-after-free the next time the list is walked. The remove path already does the right thing by calling isys_notifier_cleanup() before isys_unregister_devices(). Mirror that on the probe error path so the notifier is unregistered and cleaned up before the device is torn down.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-89522 since 09/11/2026. The exploitation is known to be easy. Attacking locally is a requirement. Additional levels of successful authentication are necessary for exploitation. 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 09/12/2026).

Upgrading to version 6.18.50, 7.2.4 or 7.3-rc1 eliminates this vulnerability. Applying the patch 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81/323c411fb63122e8cef5b833032d69d59a838559/d7f48aa7d60c65d3e6d5312c27f17d5525a245fb 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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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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

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 6.18.50/7.2.4/7.3-rc1
Patch: 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81/323c411fb63122e8cef5b833032d69d59a838559/d7f48aa7d60c65d3e6d5312c27f17d5525a245fb

Timelineinfo

09/11/2026 CVE reserved
09/11/2026 +0 days VulDB entry created
09/12/2026 +0 days Advisory disclosed
09/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89522 (🔒)
GCVE (CVE): GCVE-0-2026-89522
GCVE (VulDB): GCVE-100-402923

Entryinfo

Created: 09/12/2026 01:50
Changes: 09/12/2026 01:50 (60)
Complete: 🔍
Cache ID: 216::103

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