CVE-2026-23101

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The first led_classdev_register() causes an async modprobe of\nsnd_ctl_led to run and that async modprobe manages to exactly hit\nthe window where the second LED is on the leds_list without led_init_core()\nbeing called for it, resulting in:\n\n ------------[ cut here ]------------\n WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390\n Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025\n ...\n Call trace:\n __flush_work+0x344/0x390 (P)\n flush_work+0x2c/0x50\n led_trigger_set+0x1c8/0x340\n led_trigger_register+0x17c/0x1c0\n led_trigger_register_simple+0x84/0xe8\n snd_ctl_led_init+0x40/0xf88 [snd_ctl_led]\n do_one_initcall+0x5c/0x318\n do_init_module+0x9c/0x2b8\n load_module+0x7e0/0x998\n\nClose the race window by moving the adding of the LED to leds_list to\nafter the led_init_core() call."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/leds/led-class.c"], "versions": [{"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "f7a6df659af777058833802c29b3b7974db5e78a", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "d117fdcb21b05c0e0460261d017b92303cd9ba77", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "e90c861411fc84629a240384b0a72830539d3386", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "2757f7748ce2d0fa44112024907bafb37e104d6e", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "da565bf98c9ad0eabcb09fc97859e0b52f98b7c3", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "78822628165f3d817382f67f91129161159ca234", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "d1883cefd31752f0504b94c3bcfa1f6d511d6e87", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/leds/led-class.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.249", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.68", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "3.7", "versionEndExcluding": "5.10.249"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.15.199"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.162"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a"}, {"url": "https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77"}, {"url": "https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386"}, {"url": "https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e"}, {"url": "https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3"}, {"url": "https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234"}, {"url": "https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87"}], "title": "leds: led-class: Only Add LED to leds_list when it is fully ready", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-23101", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-10T20:41:07.068971Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T18:25:30.935Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23101", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.965Z", "datePublished": "2026-02-04T16:08:23.329Z", "dateUpdated": "2026-10-19T18:25:30.935Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:00:04.278Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nleds: led-class: Only Add LED to leds_list when it is fully ready\n\nBefore this change the LED was added to leds_list before led_init_core()\ngets called adding it the list before led_classdev.set_brightness_work gets\ninitialized.\n\nThis leaves a window where led_trigger_register() of a LED's default\ntrigger will call led_trigger_set() which calls led_set_brightness()\nwhich in turn will end up queueing the *uninitialized*\nled_classdev.set_brightness_work.\n\nThis race gets hit by the lenovo-thinkpad-t14s EC driver which registers\n2 LEDs with a default trigger provided by snd_ctl_led.ko in quick\nsuccession. The first led_classdev_register() causes an async modprobe of\nsnd_ctl_led to run and that async modprobe manages to exactly hit\nthe window where the second LED is on the leds_list without led_init_core()\nbeing called for it, resulting in:\n\n ------------[ cut here ]------------\n WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390\n Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025\n ...\n Call trace:\n __flush_work+0x344/0x390 (P)\n flush_work+0x2c/0x50\n led_trigger_set+0x1c8/0x340\n led_trigger_register+0x17c/0x1c0\n led_trigger_register_simple+0x84/0xe8\n snd_ctl_led_init+0x40/0xf88 [snd_ctl_led]\n do_one_initcall+0x5c/0x318\n do_init_module+0x9c/0x2b8\n load_module+0x7e0/0x998\n\nClose the race window by moving the adding of the LED to leds_list to\nafter the led_init_core() call."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/leds/led-class.c"], "versions": [{"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "f7a6df659af777058833802c29b3b7974db5e78a", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "d117fdcb21b05c0e0460261d017b92303cd9ba77", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "e90c861411fc84629a240384b0a72830539d3386", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "2757f7748ce2d0fa44112024907bafb37e104d6e", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "da565bf98c9ad0eabcb09fc97859e0b52f98b7c3", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "78822628165f3d817382f67f91129161159ca234", "status": "affected", "versionType": "git"}, {"version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "lessThan": "d1883cefd31752f0504b94c3bcfa1f6d511d6e87", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/leds/led-class.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.249", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": 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"versionType": "git"}, {"lessThan": "78822628165f3d817382f67f91129161159ca234", "status": "affected", "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "versionType": "git"}, {"lessThan": "d1883cefd31752f0504b94c3bcfa1f6d511d6e87", "status": "affected", "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/leds/led-class.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.7"}, {"lessThan": "3.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.249", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.199", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.162", "versionType": "semver"}, {"lessThanOrEqual": 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"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nleds: led-class: Only Add LED to leds_list when it is fully ready\n\nBefore this change the LED was added to leds_list before led_init_core()\ngets called adding it the list before led_classdev.set_brightness_work gets\ninitialized.\n\nThis leaves a window where led_trigger_register() of a LED's default\ntrigger will call led_trigger_set() which calls led_set_brightness()\nwhich in turn will end up queueing the *uninitialized*\nled_classdev.set_brightness_work.\n\nThis race gets hit by the lenovo-thinkpad-t14s EC driver which registers\n2 LEDs with a default trigger provided by snd_ctl_led.ko in quick\nsuccession. The first led_classdev_register() causes an async modprobe of\nsnd_ctl_led to run and that async modprobe manages to exactly hit\nthe window where the second LED is on the leds_list without led_init_core()\nbeing called for it, resulting in:\n\n ------------[ cut here ]------------\n WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390\n Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025\n ...\n Call trace:\n __flush_work+0x344/0x390 (P)\n flush_work+0x2c/0x50\n led_trigger_set+0x1c8/0x340\n led_trigger_register+0x17c/0x1c0\n led_trigger_register_simple+0x84/0xe8\n snd_ctl_led_init+0x40/0xf88 [snd_ctl_led]\n do_one_initcall+0x5c/0x318\n do_init_module+0x9c/0x2b8\n load_module+0x7e0/0x998\n\nClose the race window by moving the adding of the LED to leds_list to\nafter the led_init_core() call."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nleds: led-class: Solo a\u00f1adir el LED a leds_list cuando est\u00e9 completamente listo\n\nAntes de este cambio, el LED se a\u00f1ad\u00eda a leds_list antes de que se llamara a led_init_core(), a\u00f1adi\u00e9ndolo a la lista antes de que se inicializara led_classdev.set_brightness_work.\n\nEsto deja una ventana donde led_trigger_register() del disparador predeterminado de un LED llamar\u00e1 a led_trigger_set(), que llama a led_set_brightness(), lo que a su vez terminar\u00e1 encolando el led_classdev.set_brightness_work *no inicializado*.\n\nEsta condici\u00f3n de carrera es activada por el controlador EC de lenovo-thinkpad-t14s, que registra 2 LEDs con un disparador predeterminado proporcionado por snd_ctl_led.ko en r\u00e1pida sucesi\u00f3n. La primera llamada a led_classdev_register() provoca la ejecuci\u00f3n de un modprobe as\u00edncrono de snd_ctl_led y ese modprobe as\u00edncrono logra alcanzar exactamente la ventana donde el segundo LED est\u00e1 en leds_list sin que se haya llamado a led_init_core() para \u00e9l, resultando en:\n\n ------------[ cut here ]------------\n ADVERTENCIA: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390\n Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025\n ...\n Rastreo de llamadas:\n __flush_work+0x344/0x390 (P)\n flush_work+0x2c/0x50\n led_trigger_set+0x1c8/0x340\n led_trigger_register+0x17c/0x1c0\n led_trigger_register_simple+0x84/0xe8\n snd_ctl_led_init+0x40/0xf88 [snd_ctl_led]\n do_one_initcall+0x5c/0x318\n do_init_module+0x9c/0x2b8\n load_module+0x7e0/0x998\n\nCerrar la ventana de la condici\u00f3n de carrera moviendo la adici\u00f3n del LED a leds_list a despu\u00e9s de la llamada a led_init_core()."}], "id": "CVE-2026-23101", "lastModified": "2026-10-19T19:17:36.423", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23101", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T20:41:07.068971Z", "version": "2.0.3"}}]}, "published": "2026-02-04T17:16:20.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: leds: led-class: Only Add LED to leds_list when it is fully ready", "id": "2436766", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436766"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23101", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23101\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23101\nhttps://lore.kernel.org/linux-cve-announce/2026020428-CVE-2026-23101-47e0@gregkh/T"], "threat_severity": "Low"}

{"created": "2026-04-18T18:30:07.292534+00:00", "updated": "2026-10-23T09:00:15.794253+00:00", "vendors": []}