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CVE-2026-89946 (GCVE-0-2026-89946)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-09-16 10:32
VLAI
Title
ASoC: cs35l33: drain threaded IRQ before runtime suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: cs35l33: drain threaded IRQ before runtime suspend cs35l33_runtime_suspend() currently switches the codec into regcache_cache_only(true) and powers it down without first quiescing the threaded IRQ registered by devm_request_threaded_irq(). That leaves a window where cs35l33_irq_thread() can still run after suspend has closed off live register access. A running system can reach this during runtime PM while the driver still has critical fault IRQs unmasked. If the threaded handler runs in that window, it reads volatile INT_STATUS_1/2 after cache_only has been enabled, ignores the regmap_read() failures, and can still drive the AMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths. Use disable_irq() before entering cache_only/power-off so any in-flight threaded handler is drained and no new IRQ thread can run during the suspended state. Re-enable the IRQ only after runtime_resume() has restored live register access with regcache_sync(). Since probe only warns if devm_request_threaded_irq() fails, track whether the IRQ was actually installed before disabling or re-enabling it.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < d07799302721d381aef834fac8a11d196894eccb (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < 5b5311427e54d9c0d07178ee42df68ba44c2d5ca (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < a04722542c76ce861031384480825afded8cc4f4 (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < 614c2616ea677abfbed917a92bdc5141efff3536 (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < 6ae98918240585eb2ad32b097c4810f4e2dabe88 (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < 6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2 (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < 84cf6acd01a1ec8f30276578a039216327af782e (git)
Affected: 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 , < e074c12c428c633e079154301207a6079a208583 (git)
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Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "version": "5.15.221",
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              "version": "6.1.188",
              "versionType": "semver"
            },
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              "version": "6.6.157",
              "versionType": "semver"
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              "version": "6.12.110",
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              "status": "unaffected",
              "version": "6.18.51",
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              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: cs35l33: drain threaded IRQ before runtime suspend\n\ncs35l33_runtime_suspend() currently switches the codec into\nregcache_cache_only(true) and powers it down without first quiescing the\nthreaded IRQ registered by devm_request_threaded_irq(). That leaves a\nwindow where cs35l33_irq_thread() can still run after suspend has closed\noff live register access.\n\nA running system can reach this during runtime PM while the driver still\nhas critical fault IRQs unmasked. If the threaded handler runs in that\nwindow, it reads volatile INT_STATUS_1/2 after cache_only has been\nenabled, ignores the regmap_read() failures, and can still drive the\nAMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths.\n\nUse disable_irq() before entering cache_only/power-off so any in-flight\nthreaded handler is drained and no new IRQ thread can run during the\nsuspended state. Re-enable the IRQ only after runtime_resume() has\nrestored live register access with regcache_sync(). Since probe only\nwarns if devm_request_threaded_irq() fails, track whether the IRQ was\nactually installed before disabling or re-enabling it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:32:32.675Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/d07799302721d381aef834fac8a11d196894eccb"
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          "url": "https://git.kernel.org/stable/c/5b5311427e54d9c0d07178ee42df68ba44c2d5ca"
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          "url": "https://git.kernel.org/stable/c/e074c12c428c633e079154301207a6079a208583"
        }
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      "title": "ASoC: cs35l33: drain threaded IRQ before runtime suspend",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89946",
    "datePublished": "2026-09-16T10:32:32.675Z",
    "dateReserved": "2026-09-11T19:38:34.777Z",
    "dateUpdated": "2026-09-16T10:32:32.675Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "cve": "CVE-2026-89946",
      "id": "msrc_CVE-2026-89946",
      "initial_release_date": "2026-09-17T01:03:17.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ASoC: cs35l33: drain threaded IRQ before runtime suspend",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89946.json",
      "version": "1"
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If the threaded handler runs in that\\nwindow, it reads volatile INT_STATUS_1/2 after cache_only has been\\nenabled, ignores the regmap_read() failures, and can still drive the\\nAMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths.\\n\\nUse disable_irq() before entering cache_only/power-off so any in-flight\\nthreaded handler is drained and no new IRQ thread can run during the\\nsuspended state. Re-enable the IRQ only after runtime_resume() has\\nrestored live register access with regcache_sync(). Since probe only\\nwarns if devm_request_threaded_irq() fails, track whether the IRQ was\\nactually installed before disabling or re-enabling it.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/soc/codecs/cs35l33.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"d07799302721d381aef834fac8a11d196894eccb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"5b5311427e54d9c0d07178ee42df68ba44c2d5ca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"a04722542c76ce861031384480825afded8cc4f4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"614c2616ea677abfbed917a92bdc5141efff3536\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"6ae98918240585eb2ad32b097c4810f4e2dabe88\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"84cf6acd01a1ec8f30276578a039216327af782e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8\",\"lessThan\":\"e074c12c428c633e079154301207a6079a208583\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/soc/codecs/cs35l33.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5b5311427e54d9c0d07178ee42df68ba44c2d5ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/614c2616ea677abfbed917a92bdc5141efff3536\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ae98918240585eb2ad32b097c4810f4e2dabe88\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/84cf6acd01a1ec8f30276578a039216327af782e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a04722542c76ce861031384480825afded8cc4f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d07799302721d381aef834fac8a11d196894eccb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e074c12c428c633e079154301207a6079a208583\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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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.