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rtc: pcf8563: fix clock provider leak on unbind

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: rtc: pcf8563: fix clock provider leak on unbind pcf8563_clkout_register_clk() registers the CLKOUT clock provider with of_clk_add_provider(), but nothing ever unwinds it: there is no of_clk_del_provider() call and the driver has no remove callback. Each of_clk_add_provider() allocates a struct of_clk_provider, takes a reference on the OF node and adds an entry to the global of_clk_providers list, none of which is released when the device is unbound. Every bind/unbind (or module reload) therefore leaks a provider structure and an of_node reference. The clock itself is already device-managed (devm_clk_register()); only the provider registration was not. Use devm_of_clk_add_hw_provider() so the provider is removed automatically on unbind. Tie it to the parent i2c device, whose OF node carries the #clock-cells and clock-output-names properties (the RTC class device has no OF node of its own).

Announced Source revision 1
Original source ↗

CVE-2026-90126

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-2026-90126

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": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "30b7c63af50fe1464e7582a37de1ca4bd030ecc1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "7afb8db47c4f107bce89cfe5115fb31ba7c94665",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "97edf3fd9a46ea89a167966991c0449cfa07b36f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "08a59c28c2bdbcd655e99526c86a41dc83834283",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "6218c0533a72235ec9c5f41b812c63d963bd4a3e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a39a6405d5f949bc651694028a55d74c514ef1f9",
        "lessThan": "9c48a53685040bb0de45a640b34055cbbfc69d4f",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/rtc/rtc-pcf8563.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.4",
        "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": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/rtc/rtc-pcf8563.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90126

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36528 · Revision 1
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Publisher date
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