CVE-2026-89945 (GCVE-0-2026-89945)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-10-19 08:55
VLAI
Title
ASoC: cs35l34: drain threaded IRQ before runtime suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: cs35l34: drain threaded IRQ before runtime suspend cs35l34_runtime_suspend() currently switches the codec into regcache_cache_only(true), asserts reset low, and powers the device off without first quiescing the threaded IRQ registered by devm_request_threaded_irq(). That leaves a window where cs35l34_irq_thread() can still run after suspend has removed live hardware 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..4 after cache_only has been enabled, ignores the regmap_read() failures, and can still execute the PROT_RELEASE_CTL release sequence or the BST fault power-down writes. Use disable_irq() before entering cache_only/reset-low/power-off so any in-flight threaded handler is drained and no new IRQ thread can run while the device is suspended. Re-enable the IRQ only after runtime_resume() has restored live register access with regcache_sync(). Since probe only logs request_threaded_irq() failures and keeps going, track whether the IRQ was actually installed before disabling or re-enabling it.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 3be8380fb14d602cd833e5852e6d83c1e7eb1ceb (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 96982734e765c13c3db02067e1d5784682085f5c (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 5b063739619990d5de0c94c85d6e5be14e7cbdfe (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < f4bfd755c52dfa7584e6c9374206b71b8895c997 (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 4fe8a91a9266f1321c2d31ce67940a4e8b93559e (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 5a4fe7a87841af23ba80bae31b80355b16926cf4 (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 07a86575edc308e66b6c8873ed4a93ef3a063e55 (git)
Affected: c1124c09e1035cabdbc17d4538ae6f922086fec9 , < 4105a4c0678b2808fc8046b60321b4f1cc7dae75 (git)
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Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (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 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: cs35l34: drain threaded IRQ before runtime suspend\n\ncs35l34_runtime_suspend() currently switches the codec into\nregcache_cache_only(true), asserts reset low, and powers the device off\nwithout first quiescing the threaded IRQ registered by\ndevm_request_threaded_irq(). That leaves a window where\ncs35l34_irq_thread() can still run after suspend has removed live\nhardware 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..4 after cache_only has been\nenabled, ignores the regmap_read() failures, and can still execute the\nPROT_RELEASE_CTL release sequence or the BST fault power-down writes.\n\nUse disable_irq() before entering cache_only/reset-low/power-off so any\nin-flight threaded handler is drained and no new IRQ thread can run\nwhile the device is suspended. Re-enable the IRQ only after\nruntime_resume() has restored live register access with regcache_sync().\nSince probe only logs request_threaded_irq() failures and keeps going,\ntrack whether the IRQ was actually installed before disabling or\nre-enabling it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:55:19.518Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89945",
    "datePublished": "2026-09-16T10:32:31.951Z",
    "dateReserved": "2026-09-11T19:38:34.777Z",
    "dateUpdated": "2026-10-19T08:55:19.518Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: cs35l34: drain threaded IRQ before runtime suspend\n\ncs35l34_runtime_suspend() currently switches the codec into\nregcache_cache_only(true), asserts reset low, and powers the device off\nwithout first quiescing the threaded IRQ registered by\ndevm_request_threaded_irq(). That leaves a window where\ncs35l34_irq_thread() can still run after suspend has removed live\nhardware 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..4 after cache_only has been\nenabled, ignores the regmap_read() failures, and can still execute the\nPROT_RELEASE_CTL release sequence or the BST fault power-down writes.\n\nUse disable_irq() before entering cache_only/reset-low/power-off so any\nin-flight threaded handler is drained and no new IRQ thread can run\nwhile the device is suspended. Re-enable the IRQ only after\nruntime_resume() has restored live register access with regcache_sync().\nSince probe only logs request_threaded_irq() failures and keeps going,\ntrack whether the IRQ was actually installed before disabling or\nre-enabling it."
          }
        ],
        "id": "CVE-2026-89945",
        "lastModified": "2026-10-19T09:18:40.383",
        "metrics": {},
        "published": "2026-09-16T11:17:04.383",
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            "url": "https://git.kernel.org/stable/c/f4bfd755c52dfa7584e6c9374206b71b8895c997"
          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-07T10:32:08+00:00",
      "cve": "CVE-2026-89945",
      "id": "CVE-2026-89945",
      "initial_release_date": "2026-09-16T00:00:00+00:00",
      "product_status:known_not_affected": "203",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: cs35l34: drain threaded IRQ before runtime suspend",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89945.json",
      "version": "3"
    }
  }
}



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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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