CVE-2026-90208 (GCVE-0-2026-90208)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-30 12:34
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type Samsung PWM timer might be used as a clock source on some legacy systems. When PREEMPT_RT is enabled on ARM, regular spinlock is converted to a sleeping lock (mutex-based), which must not be used in atomic context such as hard interrupt handlers. Switch the samsung_pwm_lock to the raw_spinlock, which remains a true non-sleeping spinlock even under PREEMPT_RT.
References
Impacted products
Vendor Product Version
Linux Linux Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
Version: f11899894c0a683c754ca71b45f7c9c3d35a3a1c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/samsung_pwm_timer.c",
            "drivers/pwm/pwm-samsung.c",
            "include/clocksource/samsung_pwm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/samsung_pwm_timer.c",
            "drivers/pwm/pwm-samsung.c",
            "include/clocksource/samsung_pwm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.10"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
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              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type\n\nSamsung PWM timer might be used as a clock source on some legacy systems.\nWhen PREEMPT_RT is enabled on ARM, regular spinlock is converted to a\nsleeping lock (mutex-based), which must not be used in atomic context\nsuch as hard interrupt handlers. Switch the samsung_pwm_lock to the\nraw_spinlock, which remains a true non-sleeping spinlock even\nunder PREEMPT_RT."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:34:47.590Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9c97311a5f5d388eece66fc415167b38f35fe6a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f823b47eb889ea70f4c360164e96453f40e3646"
        },
        {
          "url": "https://git.kernel.org/stable/c/5720fe5cabda19f395d194ca57321c7b85f8af80"
        },
        {
          "url": "https://git.kernel.org/stable/c/a25ea67a913f98b8461aff1e9e3a5f6dc2378395"
        },
        {
          "url": "https://git.kernel.org/stable/c/7eb5764d25c4ac7f5d126621660f7219b61fd2fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b212f9d70805d91febae01d618868f4860e267c"
        }
      ],
      "title": "clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90208",
    "datePublished": "2026-09-17T16:07:23.479Z",
    "dateReserved": "2026-09-11T19:38:34.793Z",
    "dateUpdated": "2026-10-30T12:34:47.590Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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