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media: cx23885: cancel NetUP CI work before teardown

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: media: cx23885: cancel NetUP CI work before teardown netup_ci_exit() frees a netup_ci_state while its work item, netup_read_ci_status(), may still be pending or running on the system workqueue. The worker obtains the state with container_of() and dereferences it, so it must not outlive the state. netup_ci_init() queues the initial status read, and CI GPIO interrupts subsequently queue the same work from netup_ci_slot_status(). During remove, cx23885_finidev() calls free_irq() before the CI device is unregistered. free_irq() prevents further IRQ handlers from running, but does not drain work queued previously, so the worker can run after netup_ci_exit() frees the state. Call cancel_work_sync() before dvb_ca_en50221_release() and kfree(). This issue was found by an in-house static analysis tool.

Announced Source revision 1
Original source ↗

CVE-2026-89893

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89893

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "aaf76794b870b0f391eff339252a2e2e22f33a4a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "f7ff5adb63c1b277565afa54ccc0924d841b4a52",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "140ecbcbf978fbe60f83f8d4f8b1199029a5c763",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "ec82b0cf7f75fd95802592dcc9560fc7f529bba4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "99cd62b9b1c818d6d01a87be9a8e5796314150a2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c184dcd282337c09695a4c1761d7ac77fdc8fb7d",
        "lessThan": "4e143d662ca94888b494b2427fc9e34494eb933a",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/pci/cx23885/cimax2.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.30"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.30",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/pci/cx23885/cimax2.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89893

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36342 · Revision 1
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Publisher date
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