CVE-2025-68373 (GCVE-0-2025-68373)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2025-12-24 10:33
VLAI?
Title
md: avoid repeated calls to del_gendisk
Summary
In the Linux kernel, the following vulnerability has been resolved: md: avoid repeated calls to del_gendisk There is a uaf problem which is found by case 23rdev-lifetime: Oops: general protection fault, probably for non-canonical address 0xdead000000000122 RIP: 0010:bdi_unregister+0x4b/0x170 Call Trace: <TASK> __del_gendisk+0x356/0x3e0 mddev_unlock+0x351/0x360 rdev_attr_store+0x217/0x280 kernfs_fop_write_iter+0x14a/0x210 vfs_write+0x29e/0x550 ksys_write+0x74/0xf0 do_syscall_64+0xbb/0x380 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff5250a177e The sequence is: 1. rdev remove path gets reconfig_mutex 2. rdev remove path release reconfig_mutex in mddev_unlock 3. md stop calls do_md_stop and sets MD_DELETED 4. rdev remove path calls del_gendisk because MD_DELETED is set 5. md stop path release reconfig_mutex and calls del_gendisk again So there is a race condition we should resolve. This patch adds a flag MD_DO_DELETE to avoid the race condition.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9e59d609763f70a992a8f3808dabcce60f14eb5c , < b4c5cf406062ad44cd178269571530c6435b2f3b (git)
Affected: 9e59d609763f70a992a8f3808dabcce60f14eb5c , < f0fae1debeb9102398ddf2ef69b4f5d395afafed (git)
Affected: 9e59d609763f70a992a8f3808dabcce60f14eb5c , < 90e3bb44c0a86e245d8e5c6520206fa113acb1ee (git)
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    Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/md/md.c",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: avoid repeated calls to del_gendisk\n\nThere is a uaf problem which is found by case 23rdev-lifetime:\n\nOops: general protection fault, probably for non-canonical address 0xdead000000000122\nRIP: 0010:bdi_unregister+0x4b/0x170\nCall Trace:\n \u003cTASK\u003e\n __del_gendisk+0x356/0x3e0\n mddev_unlock+0x351/0x360\n rdev_attr_store+0x217/0x280\n kernfs_fop_write_iter+0x14a/0x210\n vfs_write+0x29e/0x550\n ksys_write+0x74/0xf0\n do_syscall_64+0xbb/0x380\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7ff5250a177e\n\nThe sequence is:\n1. rdev remove path gets reconfig_mutex\n2. rdev remove path release reconfig_mutex in mddev_unlock\n3. md stop calls do_md_stop and sets MD_DELETED\n4. rdev remove path calls del_gendisk because MD_DELETED is set\n5. md stop path release reconfig_mutex and calls del_gendisk again\n\nSo there is a race condition we should resolve. This patch adds a\nflag MD_DO_DELETE to avoid the race condition."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:33:03.375Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee"
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      ],
      "title": "md: avoid repeated calls to del_gendisk",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68373",
    "datePublished": "2025-12-24T10:33:03.375Z",
    "dateReserved": "2025-12-16T14:48:05.310Z",
    "dateUpdated": "2025-12-24T10:33:03.375Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68373\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:16:00.890\",\"lastModified\":\"2025-12-24T11:16:00.890\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmd: avoid repeated calls to del_gendisk\\n\\nThere is a uaf problem which is found by case 23rdev-lifetime:\\n\\nOops: general protection fault, probably for non-canonical address 0xdead000000000122\\nRIP: 0010:bdi_unregister+0x4b/0x170\\nCall Trace:\\n \u003cTASK\u003e\\n __del_gendisk+0x356/0x3e0\\n mddev_unlock+0x351/0x360\\n rdev_attr_store+0x217/0x280\\n kernfs_fop_write_iter+0x14a/0x210\\n vfs_write+0x29e/0x550\\n ksys_write+0x74/0xf0\\n do_syscall_64+0xbb/0x380\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\nRIP: 0033:0x7ff5250a177e\\n\\nThe sequence is:\\n1. rdev remove path gets reconfig_mutex\\n2. rdev remove path release reconfig_mutex in mddev_unlock\\n3. md stop calls do_md_stop and sets MD_DELETED\\n4. rdev remove path calls del_gendisk because MD_DELETED is set\\n5. md stop path release reconfig_mutex and calls del_gendisk again\\n\\nSo there is a race condition we should resolve. This patch adds a\\nflag MD_DO_DELETE to avoid the race condition.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed\",\"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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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