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FKIE_CVE-2026-89945

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 11:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07a86575edc308e66b6c8873ed4a93ef3a063e55
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3be8380fb14d602cd833e5852e6d83c1e7eb1ceb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4105a4c0678b2808fc8046b60321b4f1cc7dae75
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fe8a91a9266f1321c2d31ce67940a4e8b93559e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a4fe7a87841af23ba80bae31b80355b16926cf4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b063739619990d5de0c94c85d6e5be14e7cbdfe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96982734e765c13c3db02067e1d5784682085f5c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4bfd755c52dfa7584e6c9374206b71b8895c997
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/codecs/cs35l34.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3be8380fb14d602cd833e5852e6d83c1e7eb1ceb",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "96982734e765c13c3db02067e1d5784682085f5c",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "5b063739619990d5de0c94c85d6e5be14e7cbdfe",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "f4bfd755c52dfa7584e6c9374206b71b8895c997",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "4fe8a91a9266f1321c2d31ce67940a4e8b93559e",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "5a4fe7a87841af23ba80bae31b80355b16926cf4",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "07a86575edc308e66b6c8873ed4a93ef3a063e55",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            },
            {
              "lessThan": "4105a4c0678b2808fc8046b60321b4f1cc7dae75",
              "status": "affected",
              "version": "c1124c09e1035cabdbc17d4538ae6f922086fec9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/codecs/cs35l34.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "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."
    }
  ],
  "id": "CVE-2026-89945",
  "lastModified": "2026-09-16T11:17:04.383",
  "metrics": {},
  "published": "2026-09-16T11:17:04.383",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07a86575edc308e66b6c8873ed4a93ef3a063e55"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3be8380fb14d602cd833e5852e6d83c1e7eb1ceb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4105a4c0678b2808fc8046b60321b4f1cc7dae75"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4fe8a91a9266f1321c2d31ce67940a4e8b93559e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a4fe7a87841af23ba80bae31b80355b16926cf4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5b063739619990d5de0c94c85d6e5be14e7cbdfe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96982734e765c13c3db02067e1d5784682085f5c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f4bfd755c52dfa7584e6c9374206b71b8895c997"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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