Linux Kernel up to 7.2.5 pinctrl mtk_eint_do_init memory leak

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.77

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.51/7.2.5. Affected by this issue is the function mtk_eint_do_init of the component pinctrl. Executing a manipulation can lead to memory leak. The identification of this vulnerability is CVE-2026-92481. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.51/7.2.5. It has been declared as critical. This vulnerability affects the function mtk_eint_do_init of the component pinctrl. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: pinctrl: mediatek: free EINT resources on unbind mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for every EINT line and installs a chained handler on the parent interrupt, but none of these are ever released. This was harmless while the drivers were built-in, but now that they can be built as modules and unbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings whose chip data points at freed memory, and a chained handler that keeps firing into that freed data. The plain allocations in mtk_eint_do_init() already use the device-managed devm_*() helpers, so tear the remaining resources down the same way: register a devm action that detaches the chained handler, waits for any in-flight handler to finish, disposes of the per-line mappings and removes the IRQ domain. This mirrors the device-managed lifecycle adopted for the GPIO chip and keeps the whole EINT setup self-cleaning on unbind.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-92481 since 09/16/2026. The exploitation appears to be easy. The attack needs to be approached locally. Additional levels of successful authentication are needed for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 23252bc1cd9a58a039c9b1ae77b22d2b33da48e9/903a7cdf63a81d3738594c5bd1b5955f58fda427/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd/7f6d898179ca4771ee602bdad4246c3952af83eb/e06785cba7f86d72abd531058b1a82d6952a7346/88292b7103d260e3e606eb3bb2794060a5fde48e 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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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.7
VulDB Temp Score: 7.4
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 6.1.188/6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 23252bc1cd9a58a039c9b1ae77b22d2b33da48e9/903a7cdf63a81d3738594c5bd1b5955f58fda427/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd/7f6d898179ca4771ee602bdad4246c3952af83eb/e06785cba7f86d72abd531058b1a82d6952a7346/88292b7103d260e3e606eb3bb2794060a5fde48e

Timelineinfo

09/16/2026 CVE reserved
09/17/2026 +1 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-92481 (🔒)
GCVE (CVE): GCVE-0-2026-92481
GCVE (VulDB): GCVE-100-406924

Entryinfo

Created: 09/17/2026 22:02
Changes: 09/17/2026 22:02 (59)
Complete: 🔍
Cache ID: 216::103

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