CVE-2025-68336 (GCVE-0-2025-68336)

Vulnerability from cvelistv5 – Published: 2025-12-22 16:14 – Updated: 2025-12-22 16:14
VLAI?
Title
locking/spinlock/debug: Fix data-race in do_raw_write_lock
Summary
In the Linux kernel, the following vulnerability has been resolved: locking/spinlock/debug: Fix data-race in do_raw_write_lock KCSAN reports: BUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock write (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1: do_raw_write_lock+0x120/0x204 _raw_write_lock_irq do_exit call_usermodehelper_exec_async ret_from_fork read to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0: do_raw_write_lock+0x88/0x204 _raw_write_lock_irq do_exit call_usermodehelper_exec_async ret_from_fork value changed: 0xffffffff -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111 Commit 1a365e822372 ("locking/spinlock/debug: Fix various data races") has adressed most of these races, but seems to be not consistent/not complete. >From do_raw_write_lock() only debug_write_lock_after() part has been converted to WRITE_ONCE(), but not debug_write_lock_before() part. Do it now.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1a365e822372ba24c9da0822bc583894f6f3d821 , < b163a5e8c703201c905d6ec7920ed79d167e8442 (git)
Affected: 1a365e822372ba24c9da0822bc583894f6f3d821 , < 16b3590c0e1e615757dade098c8fbc0d4f040c76 (git)
Affected: 1a365e822372ba24c9da0822bc583894f6f3d821 , < 396a9270a7b90886be501611b13aa636f2e8c703 (git)
Affected: 1a365e822372ba24c9da0822bc583894f6f3d821 , < c14ecb555c3ee80eeb030a4e46d00e679537f03a (git)
Affected: 3106fb78d3579c8e9c9b3040f7f7841981919624 (git)
Affected: c0911024ff927ba5c4786b507004cb615be1d776 (git)
Affected: 09226e5c38639437565af01e6009a9286a351d04 (git)
Affected: c7673f01604fa722b9d7c1e29e17cec1b8ae09c5 (git)
Affected: c120c3dbeb76305235c8e557f84d9e2d7d0f5933 (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 6.12.62 , ≤ 6.12.* (semver)
Unaffected: 6.17.12 , ≤ 6.17.* (semver)
Unaffected: 6.18.1 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/spinlock/debug: Fix data-race in do_raw_write_lock\n\nKCSAN reports:\n\nBUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock\n\nwrite (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:\n do_raw_write_lock+0x120/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nread to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:\n do_raw_write_lock+0x88/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nvalue changed: 0xffffffff -\u003e 0x00000001\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111\n\nCommit 1a365e822372 (\"locking/spinlock/debug: Fix various data races\") has\nadressed most of these races, but seems to be not consistent/not complete.\n\n\u003eFrom do_raw_write_lock() only debug_write_lock_after() part has been\nconverted to WRITE_ONCE(), but not debug_write_lock_before() part.\nDo it now."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-22T16:14:13.425Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2025-12-22T16:14:13.425Z",
    "dateReserved": "2025-12-16T14:48:05.297Z",
    "dateUpdated": "2025-12-22T16:14:13.425Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68336\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-22T17:16:01.357\",\"lastModified\":\"2025-12-23T14:51:52.650\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nlocking/spinlock/debug: Fix data-race in do_raw_write_lock\\n\\nKCSAN reports:\\n\\nBUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock\\n\\nwrite (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:\\n do_raw_write_lock+0x120/0x204\\n _raw_write_lock_irq\\n do_exit\\n call_usermodehelper_exec_async\\n ret_from_fork\\n\\nread to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:\\n do_raw_write_lock+0x88/0x204\\n _raw_write_lock_irq\\n do_exit\\n call_usermodehelper_exec_async\\n ret_from_fork\\n\\nvalue changed: 0xffffffff -\u003e 0x00000001\\n\\nReported by Kernel Concurrency Sanitizer on:\\nCPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111\\n\\nCommit 1a365e822372 (\\\"locking/spinlock/debug: Fix various data races\\\") has\\nadressed most of these races, but seems to be not consistent/not complete.\\n\\n\u003eFrom do_raw_write_lock() only debug_write_lock_after() part has been\\nconverted to WRITE_ONCE(), but not debug_write_lock_before() part.\\nDo it now.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/16b3590c0e1e615757dade098c8fbc0d4f040c76\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/396a9270a7b90886be501611b13aa636f2e8c703\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b163a5e8c703201c905d6ec7920ed79d167e8442\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c14ecb555c3ee80eeb030a4e46d00e679537f03a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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