CVE-2026-46213

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46213", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.105Z", "datePublished": "2026-05-28T09:40:30.429Z", "dateUpdated": "2026-06-14T18:03:11.677Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T18:03:11.677Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appletb-kbd: fix UAF in inactivity-timer cleanup path\n\nCommit 38224c472a03 (\"HID: appletb-kbd: fix slab use-after-free bug in\nappletb_kbd_probe\") added timer_delete_sync(&kbd->inactivity_timer) to\nboth the probe close_hw error path and appletb_kbd_remove(), but the\nway it was wired in left the inactivity timer reachable during driver\ntear-down via two distinct windows.\n\nWindow A -- put_device() before timer_delete_sync():\n\n\tput_device(&kbd->backlight_dev->dev);\n\ttimer_delete_sync(&kbd->inactivity_timer);\n\nThe inactivity_timer softirq reads kbd->backlight_dev and calls\nbacklight_device_set_brightness() -> mutex_lock(&ops_lock). If a\nconcurrent hid_appletb_bl unbind drops the last devm reference\nbetween these two calls, the backlight_device is freed and the\nmutex_lock() touches freed memory.\n\nWindow B -- backlight cleanup before hid_hw_stop():\n\n\tif (kbd->backlight_dev) {\n\t\ttimer_delete_sync(...);\n\t\tput_device(...);\n\t}\n\thid_hw_close(hdev);\n\thid_hw_stop(hdev);\n\nEven after Window A is closed, hid_hw_close()/hid_hw_stop() still run\nafterwards, so a late \".event\" callback from the HID core (USB URB\ncompletion on real Apple hardware) can arrive after\ntimer_delete_sync() drained the softirq but before put_device() drops\nthe reference. That callback reaches reset_inactivity_timer(), which\ncalls mod_timer() and re-arms the timer. The freshly re-armed timer\ncan then fire on the about-to-be-freed backlight_device.\n\nBoth windows produce the same KASAN slab-use-after-free:\n\n BUG: KASAN: slab-use-after-free in __mutex_lock+0x1aab/0x21c0\n Read of size 8 at addr ffff88803ee9a108 by task swapper/0/0\n Call Trace:\n <IRQ>\n __mutex_lock\n backlight_device_set_brightness\n appletb_inactivity_timer\n call_timer_fn\n run_timer_softirq\n handle_softirqs\n Allocated by task N:\n devm_backlight_device_register\n appletb_bl_probe\n Freed by task M:\n (concurrent hid_appletb_bl unbind path)\n\nClose both windows at once by reworking the tear-down in\nappletb_kbd_remove() and in the probe close_hw error path so that\n\n 1) hid_hw_close()/hid_hw_stop() run before the backlight cleanup,\n guaranteeing no further .event callback can fire and re-arm the\n timer, and\n 2) inside the \"if (kbd->backlight_dev)\" block, timer_delete_sync()\n runs before put_device(), so the softirq is drained before the\n final reference is dropped."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-appletb-kbd.c"], "versions": [{"version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "lessThan": "59a79938ca5541fe55d675304116b7ea684afef0", "status": "affected", "versionType": "git"}, {"version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "lessThan": "93d989e47bc316c793a69c6a332e053c90e29f02", "status": "affected", "versionType": "git"}, {"version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "lessThan": "4db2af929279c799b5653a39eb0795c72baffca4", "status": "affected", "versionType": "git"}, {"version": "51720dee3a61ebace36c3dcdd0b4a488e0970f29", "status": "affected", "versionType": "git"}, {"version": "6.15.6", "lessThan": "6.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-appletb-kbd.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/59a79938ca5541fe55d675304116b7ea684afef0"}, {"url": "https://git.kernel.org/stable/c/93d989e47bc316c793a69c6a332e053c90e29f02"}, {"url": "https://git.kernel.org/stable/c/4db2af929279c799b5653a39eb0795c72baffca4"}], "title": "HID: appletb-kbd: fix UAF in inactivity-timer cleanup path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hid/hid-appletb-kbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "59a79938ca5541fe55d675304116b7ea684afef0", "status": "affected", "version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "versionType": "git"}, {"lessThan": "93d989e47bc316c793a69c6a332e053c90e29f02", "status": "affected", "version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "versionType": "git"}, {"lessThan": "4db2af929279c799b5653a39eb0795c72baffca4", "status": "affected", "version": "38224c472a038fa9ccd4085511dd9f3d6119dbf9", "versionType": "git"}, {"status": "affected", "version": "51720dee3a61ebace36c3dcdd0b4a488e0970f29", "versionType": "git"}, {"lessThan": "6.16", "status": "affected", "version": "6.15.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hid/hid-appletb-kbd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.32", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BEF58D78-987C-49EA-8F22-0EF0F89F0A2E", "versionEndExcluding": "6.16", "versionStartIncluding": "6.15.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D8E2D8D4-D9B3-4E07-94C2-1523EED060E3", "versionEndExcluding": "6.18.32", "versionStartIncluding": "6.16.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "33ACA10B-B260-46EA-BD50-70EBE5097672", "versionEndExcluding": "7.0.9", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*", "matchCriteriaId": "6238B17D-C12B-458F-A138-97039BFC4595", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*", "matchCriteriaId": "85421F4E-C863-4ABF-B4B4-E887CC2F7F92", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*", "matchCriteriaId": "3827F0D4-5FEE-4181-B267-5A45E7CA11FC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc7:*:*:*:*:*:*", "matchCriteriaId": "7A9C2DE5-43B8-4D73-BDB5-EA55C7671A52", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appletb-kbd: fix UAF in inactivity-timer cleanup path\n\nCommit 38224c472a03 (\"HID: appletb-kbd: fix slab use-after-free bug in\nappletb_kbd_probe\") added timer_delete_sync(&kbd->inactivity_timer) to\nboth the probe close_hw error path and appletb_kbd_remove(), but the\nway it was wired in left the inactivity timer reachable during driver\ntear-down via two distinct windows.\n\nWindow A -- put_device() before timer_delete_sync():\n\n\tput_device(&kbd->backlight_dev->dev);\n\ttimer_delete_sync(&kbd->inactivity_timer);\n\nThe inactivity_timer softirq reads kbd->backlight_dev and calls\nbacklight_device_set_brightness() -> mutex_lock(&ops_lock). If a\nconcurrent hid_appletb_bl unbind drops the last devm reference\nbetween these two calls, the backlight_device is freed and the\nmutex_lock() touches freed memory.\n\nWindow B -- backlight cleanup before hid_hw_stop():\n\n\tif (kbd->backlight_dev) {\n\t\ttimer_delete_sync(...);\n\t\tput_device(...);\n\t}\n\thid_hw_close(hdev);\n\thid_hw_stop(hdev);\n\nEven after Window A is closed, hid_hw_close()/hid_hw_stop() still run\nafterwards, so a late \".event\" callback from the HID core (USB URB\ncompletion on real Apple hardware) can arrive after\ntimer_delete_sync() drained the softirq but before put_device() drops\nthe reference. That callback reaches reset_inactivity_timer(), which\ncalls mod_timer() and re-arms the timer. The freshly re-armed timer\ncan then fire on the about-to-be-freed backlight_device.\n\nBoth windows produce the same KASAN slab-use-after-free:\n\n BUG: KASAN: slab-use-after-free in __mutex_lock+0x1aab/0x21c0\n Read of size 8 at addr ffff88803ee9a108 by task swapper/0/0\n Call Trace:\n <IRQ>\n __mutex_lock\n backlight_device_set_brightness\n appletb_inactivity_timer\n call_timer_fn\n run_timer_softirq\n handle_softirqs\n Allocated by task N:\n devm_backlight_device_register\n appletb_bl_probe\n Freed by task M:\n (concurrent hid_appletb_bl unbind path)\n\nClose both windows at once by reworking the tear-down in\nappletb_kbd_remove() and in the probe close_hw error path so that\n\n 1) hid_hw_close()/hid_hw_stop() run before the backlight cleanup,\n guaranteeing no further .event callback can fire and re-arm the\n timer, and\n 2) inside the \"if (kbd->backlight_dev)\" block, timer_delete_sync()\n runs before put_device(), so the softirq is drained before the\n final reference is dropped."}], "id": "CVE-2026-46213", "lastModified": "2026-06-17T10:53:19.853", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-28T10:16:36.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4db2af929279c799b5653a39eb0795c72baffca4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/59a79938ca5541fe55d675304116b7ea684afef0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/93d989e47bc316c793a69c6a332e053c90e29f02"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: HID: appletb-kbd: fix UAF in inactivity-timer cleanup path", "id": "2482589", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482589"}, "csaw": false, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel's Apple keyboard driver (appletb-kbd). A Use-After-Free (UAF) vulnerability exists in the inactivity-timer cleanup path during driver tear-down. This can occur due to race conditions between device cleanup and timer operations, or late event callbacks re-arming the timer. A local attacker could potentially exploit this to cause memory corruption, leading to system instability or a denial of service."], "name": "CVE-2026-46213", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46213\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46213\nhttps://lore.kernel.org/linux-cve-announce/2026052835-CVE-2026-46213-8b71@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38224c472a038fa9ccd4085511dd9f3d6119dbf9,59a79938ca5541fe55d675304116b7ea684afef0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38224c472a038fa9ccd4085511dd9f3d6119dbf9,93d989e47bc316c793a69c6a332e053c90e29f02)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38224c472a038fa9ccd4085511dd9f3d6119dbf9,4db2af929279c799b5653a39eb0795c72baffca4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "51720dee3a61ebace36c3dcdd0b4a488e0970f29"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.15.6,6.16)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.32,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.9,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-28T13:15:22.415276+00:00", "updated": "2026-06-10T20:30:28.287301+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}