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tracing: Check return value of __register_event() in trace_module_add_events()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: tracing: Check return value of __register_event() in trace_module_add_events() trace_module_add_events() ignores the return value of __register_event() and unconditionally calls __add_event_to_tracers() for each event. If __register_event() fails (for example, if event_init() fails), the trace_event_call is not added to ftrace_events list, but __add_event_to_tracers() still creates a trace_event_file pointing to it. If module loading subsequently fails and module memory is freed, tracing state retains a stale trace_event_call pointer in trace_event_file, leading to a use-after-free when tracefs or tracing subsystem operations are later executed. Fix this by checking the return value of __register_event() and only calling __add_event_to_tracers() if event registration succeeded.

Announced Source revision 1
Original source ↗

CVE-2026-74471

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-2026-74471

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": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "3bf965a2827c44f03294107703e7ba53fbd0a69a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "9d6d79744f01eacaf3d5522f4fcd59939581abfd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "54b7a358f6399c1242d2fb7f4f96085af34baa5e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "22f954f7a8afe975e85517aff41b35defe05144b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "000765dcdc3edf128990762790543adc4b868f6c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae63b31e4d0e2ec09c569306ea46f664508ef717",
        "lessThan": "ac8719969e6c3c54e939834df812bc41f25453cf",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "kernel/trace/trace_events.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.151",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.103",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.44",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "kernel/trace/trace_events.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74471

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33164 · Revision 1
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Publisher date
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