pinctrl: mediatek: free EINT resources on unbind
Summary
| CVE | CVE-2026-92481 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-17 17:17:50 UTC |
| Updated | 2026-09-17 17:17:50 UTC |
| 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. |
Risk And Classification
EPSS: 0.002050000 probability, percentile 0.109500000 (date 2026-09-18)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a 23252bc1cd9a58a039c9b1ae77b22d2b33da48e9 git | Not specified |
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a 903a7cdf63a81d3738594c5bd1b5955f58fda427 git | Not specified |
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a 51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd git | Not specified |
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a 7f6d898179ca4771ee602bdad4246c3952af83eb git | Not specified |
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a e06785cba7f86d72abd531058b1a82d6952a7346 git | Not specified |
| CNA | Linux | Linux | affected e46df235b4e605aa4e7609a27c118a1cccd4ff9a 88292b7103d260e3e606eb3bb2794060a5fde48e git | Not specified |
| CNA | Linux | Linux | affected 4.18 | Not specified |
| CNA | Linux | Linux | unaffected 4.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.188 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.157 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.110 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.52 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.6 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/88292b7103d260e3e606eb3bb2794060a5fde48e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7f6d898179ca4771ee602bdad4246c3952af83eb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/903a7cdf63a81d3738594c5bd1b5955f58fda427 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/23252bc1cd9a58a039c9b1ae77b22d2b33da48e9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e06785cba7f86d72abd531058b1a82d6952a7346 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.