Linux Kernel up to 7.2.4 em28xx use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.45

Summaryinfo

A vulnerability categorized as very critical has been discovered in Linux Kernel up to 7.2.4. Affected by this issue is some unknown functionality of the component em28xx. The manipulation results in use after free. This vulnerability is cataloged as CVE-2026-89892. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 7.2.4. Affected is an unknown functionality of the component em28xx. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-89892 since 09/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/16/2026).

Upgrading to version 5.10.270, 5.15.221, 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 0da1e627f4fc9d0e947fdae90913042120878923/f8d7e77d9c621b42a191c67a9b37bec23dc1d555/1abe9524dec0fd26e9ceb8d586034d6f68dd8273/4e11c45dfdc72ab656067b1df8fcebaf52fd4715/d06067ee32620f272cfb80c7bc7c572ad4e74724/f9322ac9f862961d7f377b87ec26c8565af7e073/4666197ca4f7d80cd3b0292054fe45d76be9ba04/95f76f51937fdfb0fc1e14cae606b1ef574a56f3 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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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: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
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: No
Local: No
Remote: Yes

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 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: 0da1e627f4fc9d0e947fdae90913042120878923/f8d7e77d9c621b42a191c67a9b37bec23dc1d555/1abe9524dec0fd26e9ceb8d586034d6f68dd8273/4e11c45dfdc72ab656067b1df8fcebaf52fd4715/d06067ee32620f272cfb80c7bc7c572ad4e74724/f9322ac9f862961d7f377b87ec26c8565af7e073/4666197ca4f7d80cd3b0292054fe45d76be9ba04/95f76f51937fdfb0fc1e14cae606b1ef574a56f3

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-2026-89892 (🔒)
GCVE (CVE): GCVE-0-2026-89892
GCVE (VulDB): GCVE-100-405714

Entryinfo

Created: 09/16/2026 14:10
Changes: 09/16/2026 14:10 (58)
Complete: 🔍
Cache ID: 216::103

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