143 lines
7.8 KiB
JSON
143 lines
7.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-46202",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-13T15:03:33.104Z",
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"datePublished": "2026-05-28T09:40:18.687Z",
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"dateUpdated": "2026-06-14T18:02:25.494Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-06-14T18:02:25.494Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appletb-kbd: run inactivity autodim from workqueues\n\nThe autodim code in hid-appletb-kbd takes backlight_device->ops_lock\nvia backlight_device_set_brightness() -> mutex_lock() from two\ndifferent atomic contexts:\n\n * appletb_inactivity_timer() is a struct timer_list callback, so it\n runs in softirq context. Every expiry triggers\n\n BUG: sleeping function called from invalid context at kernel/locking/mutex.c:591\n Call Trace:\n <IRQ>\n __might_resched\n __mutex_lock\n backlight_device_set_brightness\n appletb_inactivity_timer\n call_timer_fn\n run_timer_softirq\n\n * reset_inactivity_timer() is called from appletb_kbd_hid_event() and\n appletb_kbd_inp_event(). On real USB hardware these run in\n softirq/IRQ context (URB completion and input-event dispatch).\n When the Touch Bar has already been dimmed or turned off, the\n reset path calls backlight_device_set_brightness() directly to\n restore brightness, producing the same warning.\n\nBoth call sites hit the same mutex_lock()-from-atomic bug. Fix them\ntogether by moving the blocking work onto the system workqueue:\n\n * Convert the inactivity timer from struct timer_list to\n struct delayed_work; the callback (appletb_inactivity_work) now\n runs in process context where mutex_lock() is legal.\n * Add a dedicated struct work_struct restore_brightness_work and have\n reset_inactivity_timer() schedule it instead of calling\n backlight_device_set_brightness() directly.\n\nCancel both works synchronously during driver tear-down alongside the\nexisting backlight reference drop.\n\nThe semantics are unchanged (same delays, same state transitions on\ndim, turn-off and user activity); only the execution context of the\nsleeping call changes. The timer field and callback are renamed to\nmatch their new type; reset_inactivity_timer() keeps its name because\nit is invoked from input event paths that read naturally as \"reset\nthe inactivity timer\"."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/hid/hid-appletb-kbd.c"
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],
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"versions": [
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{
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"version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
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"lessThan": "5c0830323689ef15224f0025276176988861b3b0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
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"lessThan": "2473a334c292af257ef68e33bc7760f4a8251812",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "93a0fc48948107e0cc34e1de22c3cb363a8f2783",
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"lessThan": "1654e53349d4e657b331de354313461f401f5063",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/hid/hid-appletb-kbd.c"
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],
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"versions": [
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{
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"version": "6.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.32",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.9",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.32"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.0.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.1"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/5c0830323689ef15224f0025276176988861b3b0"
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},
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{
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"url": "https://git.kernel.org/stable/c/2473a334c292af257ef68e33bc7760f4a8251812"
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},
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{
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"url": "https://git.kernel.org/stable/c/1654e53349d4e657b331de354313461f401f5063"
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}
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],
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"title": "HID: appletb-kbd: run inactivity autodim from workqueues",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |