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media: rtl2832: fix use-after-free in rtl2832_remove()

Type: advisorySource: OSV1 source record

In the Linux kernel, the following vulnerability has been resolved: media: rtl2832: fix use-after-free in rtl2832_remove() cancel_delayed_work_sync() is called before i2c_mux_del_adapters() in rtl2832_remove(). While the cancel waits for any running instance of i2c_gate_work to finish, it does not prevent the timer from being rescheduled by a concurrent thread. During probe, the r820t_attach() call attempts I2C transfers through the mux adapter. These transfers go through i2c_mux_master_xfer(), which calls rtl2832_deselect() after the transfer completes, rescheduling i2c_gate_work via schedule_delayed_work(). If this transfer is still in flight when rtl2832_remove() runs, rtl2832_deselect() can reschedule i2c_gate_work after it has been cancelled, causing a use-after-free when kfree(dev) is called. Fix this by calling i2c_mux_del_adapters() before cancel_delayed_work_sync(). Once the mux adapter is unregistered, no new I2C transfers can go through it, so rtl2832_deselect() can no longer reschedule i2c_gate_work. The subsequent cancel_delayed_work_sync() is then guaranteed to be final.

Announced Source revision 1
Original source ↗

CVE-2026-68214

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: osv:CVE-2026-68214

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
5.10.265

Source reference: /affected/1/ranges

5.15.216

Source reference: /affected/1/ranges

6.1.183

Source reference: /affected/1/ranges

6.6.148

Source reference: /affected/1/ranges

6.12.101

Source reference: /affected/1/ranges

6.18.42

Source reference: /affected/1/ranges

7.1.6

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
        "type": "GIT",
        "events": [
          {
            "introduced": "cddcc40b1b1553010acb89add84c64b5d123ec94"
          },
          {
            "fixed": "1e8a6bc19403661661fed5ae82f6eca6c9cdfad2"
          },
          {
            "fixed": "68a9c0290897c1436ddceb8cea604c93377a0299"
          },
          {
            "fixed": "13c06056699e66ff7109ba68658cc6ea4a23f516"
          },
          {
            "fixed": "9acd5bbbe1df8e487e49488692c224496d4c9e16"
          },
          {
            "fixed": "24bef237eef8dd1ebcffb129ba21891ddad0d309"
          },
          {
            "fixed": "2c71bda6edc630a1f8c3c45d8df5fc22d234e042"
          },
          {
            "fixed": "90d781711418881f8c836c2a859cc2886625d750"
          },
          {
            "fixed": "680daf40a82d483949f87f0d8f98639dc47e610c"
          }
        ]
      }
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68214.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.7.0"
          },
          {
            "fixed": "5.10.265"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.11.0"
          },
          {
            "fixed": "5.15.216"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.16.0"
          },
          {
            "fixed": "6.1.183"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.2.0"
          },
          {
            "fixed": "6.6.148"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.7.0"
          },
          {
            "fixed": "6.12.101"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.42"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.19.0"
          },
          {
            "fixed": "7.1.6"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68214.json"
    }
  }
]
Related CVEs
CVE-2026-68214

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Publisher severity

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Event
#50766 · Revision 1
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