{"id":"CVE-2026-92481","state":"PUBLISHED","title":"pinctrl: mediatek: free EINT resources on unbind","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: mediatek: free EINT resources on unbind\n\nmtk_eint_do_init() creates an IRQ domain, populates it with a mapping for\nevery EINT line and installs a chained handler on the parent interrupt,\nbut none of these are ever released. This was harmless while the drivers\nwere built-in, but now that they can be built as modules and\nunbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings\nwhose chip data points at freed memory, and a chained handler that keeps\nfiring into that freed data.\n\nThe plain allocations in mtk_eint_do_init() already use the device-managed\ndevm_*() helpers, so tear the remaining resources down the same way:\nregister a devm action that detaches the chained handler, waits for any\nin-flight handler to finish, disposes of the per-line mappings and removes\nthe IRQ domain. This mirrors the device-managed lifecycle adopted for the\nGPIO chip and keeps the whole EINT setup self-cleaning on unbind.","publishedAt":"2026-09-17T16:09:58.378Z","updatedAt":"2026-10-19T09:03:47.420Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"23252bc1cd9a58a039c9b1ae77b22d2b33da48e9","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"903a7cdf63a81d3738594c5bd1b5955f58fda427","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"7f6d898179ca4771ee602bdad4246c3952af83eb","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"e06785cba7f86d72abd531058b1a82d6952a7346","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"88292b7103d260e3e606eb3bb2794060a5fde48e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pinctrl/mediatek/mtk-eint.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pinctrl/mediatek/mtk-eint.c"]}],"references":["https://git.kernel.org/stable/c/23252bc1cd9a58a039c9b1ae77b22d2b33da48e9","https://git.kernel.org/stable/c/903a7cdf63a81d3738594c5bd1b5955f58fda427","https://git.kernel.org/stable/c/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd","https://git.kernel.org/stable/c/7f6d898179ca4771ee602bdad4246c3952af83eb","https://git.kernel.org/stable/c/e06785cba7f86d72abd531058b1a82d6952a7346","https://git.kernel.org/stable/c/88292b7103d260e3e606eb3bb2794060a5fde48e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/92xxx/CVE-2026-92481.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-92481","state":"PUBLISHED","datePublished":"2026-09-17T16:09:58.378Z","dateUpdated":"2026-10-19T09:03:47.420Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-16T12:21:13.870Z"},"containers":{"cna":{"title":"pinctrl: mediatek: free EINT resources on unbind","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: mediatek: free EINT resources on unbind\n\nmtk_eint_do_init() creates an IRQ domain, populates it with a mapping for\nevery EINT line and installs a chained handler on the parent interrupt,\nbut none of these are ever released. This was harmless while the drivers\nwere built-in, but now that they can be built as modules and\nunbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings\nwhose chip data points at freed memory, and a chained handler that keeps\nfiring into that freed data.\n\nThe plain allocations in mtk_eint_do_init() already use the device-managed\ndevm_*() helpers, so tear the remaining resources down the same way:\nregister a devm action that detaches the chained handler, waits for any\nin-flight handler to finish, disposes of the per-line mappings and removes\nthe IRQ domain. This mirrors the device-managed lifecycle adopted for the\nGPIO chip and keeps the whole EINT setup self-cleaning on unbind."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"23252bc1cd9a58a039c9b1ae77b22d2b33da48e9","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"903a7cdf63a81d3738594c5bd1b5955f58fda427","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"7f6d898179ca4771ee602bdad4246c3952af83eb","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"e06785cba7f86d72abd531058b1a82d6952a7346","versionType":"git"},{"version":"e46df235b4e605aa4e7609a27c118a1cccd4ff9a","status":"affected","lessThan":"88292b7103d260e3e606eb3bb2794060a5fde48e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pinctrl/mediatek/mtk-eint.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pinctrl/mediatek/mtk-eint.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/23252bc1cd9a58a039c9b1ae77b22d2b33da48e9"},{"url":"https://git.kernel.org/stable/c/903a7cdf63a81d3738594c5bd1b5955f58fda427"},{"url":"https://git.kernel.org/stable/c/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd"},{"url":"https://git.kernel.org/stable/c/7f6d898179ca4771ee602bdad4246c3952af83eb"},{"url":"https://git.kernel.org/stable/c/e06785cba7f86d72abd531058b1a82d6952a7346"},{"url":"https://git.kernel.org/stable/c/88292b7103d260e3e606eb3bb2794060a5fde48e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:03:47.420Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}