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CVE-2026-23101 (GCVE-0-2026-23101)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-06-11 18:44
VLAI
Title
leds: led-class: Only Add LED to leds_list when it is fully ready
Summary
In the Linux kernel, the following vulnerability has been resolved: leds: led-class: Only Add LED to leds_list when it is fully ready Before this change the LED was added to leds_list before led_init_core() gets called adding it the list before led_classdev.set_brightness_work gets initialized. This leaves a window where led_trigger_register() of a LED's default trigger will call led_trigger_set() which calls led_set_brightness() which in turn will end up queueing the *uninitialized* led_classdev.set_brightness_work. This race gets hit by the lenovo-thinkpad-t14s EC driver which registers 2 LEDs with a default trigger provided by snd_ctl_led.ko in quick succession. The first led_classdev_register() causes an async modprobe of snd_ctl_led to run and that async modprobe manages to exactly hit the window where the second LED is on the leds_list without led_init_core() being called for it, resulting in: ------------[ cut here ]------------ WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390 Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025 ... Call trace: __flush_work+0x344/0x390 (P) flush_work+0x2c/0x50 led_trigger_set+0x1c8/0x340 led_trigger_register+0x17c/0x1c0 led_trigger_register_simple+0x84/0xe8 snd_ctl_led_init+0x40/0xf88 [snd_ctl_led] do_one_initcall+0x5c/0x318 do_init_module+0x9c/0x2b8 load_module+0x7e0/0x998 Close the race window by moving the adding of the LED to leds_list to after the led_init_core() call.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:41 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < f7a6df659af777058833802c29b3b7974db5e78a (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < d117fdcb21b05c0e0460261d017b92303cd9ba77 (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < e90c861411fc84629a240384b0a72830539d3386 (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < 2757f7748ce2d0fa44112024907bafb37e104d6e (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < da565bf98c9ad0eabcb09fc97859e0b52f98b7c3 (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < 78822628165f3d817382f67f91129161159ca234 (git)
Affected: d23a22a74fded23a12434c9463fe66cec2b0afcd , < d1883cefd31752f0504b94c3bcfa1f6d511d6e87 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "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\u0027s 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": "2026-06-17T10:20:53.583",
        "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": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-908"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:18:43+00:00",
      "cve": "CVE-2026-23101",
      "id": "CVE-2026-23101",
      "initial_release_date": "2026-02-04T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: leds: led-class: Only Add LED to leds_list when it is fully ready",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23101.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-24T02:39:47Z",
      "cve": "CVE-2026-23101",
      "id": "CVE-2026-23101",
      "initial_release_date": "2026-02-05T00:24:27Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "562",
      "product_status:known_not_affected": "32",
      "product_status:recommended": "295",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23101",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23101.json",
      "version": "23"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-23101",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-06-10T20:41:07.068971Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-11T17:37:59.968Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/leds/led-class.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "f7a6df659af777058833802c29b3b7974db5e78a",
                  "status": "affected",
                  "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
                  "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd",
                  "versionType": "git"
                },
                {
                  "lessThan": "e90c861411fc84629a240384b0a72830539d3386",
                  "status": "affected",
                  "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
                  "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd",
                  "versionType": "git"
                },
                {
                  "lessThan": "da565bf98c9ad0eabcb09fc97859e0b52f98b7c3",
                  "status": "affected",
                  "version": "d23a22a74fded23a12434c9463fe66cec2b0afcd",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
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                  "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": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.122",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.68",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.19",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.249",
                      "versionStartIncluding": "3.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.199",
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                      "vulnerable": true
                    },
                    {
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                      "versionEndExcluding": "6.1.162",
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                      "vulnerable": true
                    },
                    {
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                    },
                    {
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                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "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\u0027s 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."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T22:00:04.278Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
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            {
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            },
            {
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            },
            {
              "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"
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      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-23101",
        "datePublished": "2026-02-04T16:08:23.329Z",
        "dateReserved": "2026-01-13T15:37:45.965Z",
        "dateUpdated": "2026-06-11T18:44:08.893Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.