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CVE-2026-92481— pinctrl: mediatek: free EINT resources on unbind

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： pinctrl: mediatek: 在解绑（unbind）时释放 EINT 资源 函数创建了一个 IRQ 域（IRQ domain），为每条 EINT（外部中断）线路填充了映射，并在父中断上安装了一个链式处理程序（chained handler），但这些资源从未被释放。当驱动作为内置（built-in）模块时，这个问题是无害的；但现在这些驱动可以编译为可加载模块，并支持解绑（unbind）或卸载（rmmod），导致残留了一个悬空的 IRQ 域、指向已释放内存的中断映射

AI Predicted 5.5 Difficulty: Hard EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux e46df235b4e605aa4e7609a27c118a1cccd4ff9a< 23252bc1cd9a58a039c9b1ae77b22d2b33da48e9 affected
e46df235b4e605aa4e7609a27c118a1cccd4ff9a< 903a7cdf63a81d3738594c5bd1b5955f58fda427 affected
e46df235b4e605aa4e7609a27c118a1cccd4ff9a< 51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd affected
e46df235b4e605aa4e7609a27c118a1cccd4ff9a< 7f6d898179ca4771ee602bdad4246c3952af83eb affected
e46df235b4e605aa4e7609a27c118a1cccd4ff9a< e06785cba7f86d72abd531058b1a82d6952a7346 affected
e46df235b4e605aa4e7609a27c118a1cccd4ff9a< 88292b7103d260e3e606eb3bb2794060a5fde48e affected
4.18 affected
< 4.18 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-92481

Vulnerability Information
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Vulnerability Title
pinctrl: mediatek: free EINT resources on unbind
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e46df235b4e605aa4e7609a27c118a1cccd4ff9a ~ 23252bc1cd9a58a039c9b1ae77b22d2b33da48e9 -
Linux Linux 4.18 -

II. Public POCs for CVE-2026-92481

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III. Intelligence Information for CVE-2026-92481

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Patches & Fixes for CVE-2026-92481 (6)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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