CVE-2025-68373 (GCVE-0-2025-68373)
Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2026-05-11 21:51
VLAI
EPSS
VEX
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
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
9e59d609763f70a992a8f3808dabcce60f14eb5c , < b4c5cf406062ad44cd178269571530c6435b2f3b
(git)
Affected: 9e59d609763f70a992a8f3808dabcce60f14eb5c , < f0fae1debeb9102398ddf2ef69b4f5d395afafed (git) Affected: 9e59d609763f70a992a8f3808dabcce60f14eb5c , < 90e3bb44c0a86e245d8e5c6520206fa113acb1ee (git) |
guessed | |
| 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 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/md.c",
"drivers/md/md.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b4c5cf406062ad44cd178269571530c6435b2f3b",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
},
{
"lessThan": "f0fae1debeb9102398ddf2ef69b4f5d395afafed",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
},
{
"lessThan": "90e3bb44c0a86e245d8e5c6520206fa113acb1ee",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/md.c",
"drivers/md/md.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"lessThan": "6.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.13",
"versionStartIncluding": "6.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.2",
"versionStartIncluding": "6.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19",
"versionStartIncluding": "6.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:51:57.240Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b"
},
{
"url": "https://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed"
},
{
"url": "https://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee"
}
],
"title": "md: avoid repeated calls to del_gendisk",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"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": "2026-05-11T21:51:57.240Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-68373",
"date": "2026-10-31",
"epss": "0.00186",
"percentile": "0.08213"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/md.c",
"drivers/md/md.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b4c5cf406062ad44cd178269571530c6435b2f3b",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
},
{
"lessThan": "f0fae1debeb9102398ddf2ef69b4f5d395afafed",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
},
{
"lessThan": "90e3bb44c0a86e245d8e5c6520206fa113acb1ee",
"status": "affected",
"version": "9e59d609763f70a992a8f3808dabcce60f14eb5c",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/md.c",
"drivers/md/md.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"lessThan": "6.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"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."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmd: evitar llamadas repetidas a del_gendisk\n\nHay un problema de uaf que es encontrado por el caso 23rdev-lifetime:\n\nOops: fallo de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdead000000000122\nRIP: 0010:bdi_unregister+0x4b/0x170\nTraza de Llamada:\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\nLa secuencia es:\n1. la ruta de eliminaci\u00f3n de rdev obtiene reconfig_mutex\n2. la ruta de eliminaci\u00f3n de rdev libera reconfig_mutex en mddev_unlock\n3. md stop llama a do_md_stop y establece MD_DELETED\n4. la ruta de eliminaci\u00f3n de rdev llama a del_gendisk porque MD_DELETED est\u00e1 establecido\n5. la ruta de detenci\u00f3n de md libera reconfig_mutex y llama a del_gendisk de nuevo\n\nAs\u00ed que hay una condici\u00f3n de carrera que deber\u00edamos resolver. Este parche a\u00f1ade una bandera MD_DO_DELETE para evitar la condici\u00f3n de carrera."
}
],
"id": "CVE-2025-68373",
"lastModified": "2026-10-13T11:10:00.203",
"metrics": {},
"published": "2025-12-24T11:16:00.890",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"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"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-30T10:37:19+00:00",
"cve": "CVE-2025-68373",
"id": "CVE-2025-68373",
"initial_release_date": "2025-12-24T00:00:00+00:00",
"product_status:known_affected": "198",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: md: avoid repeated calls to del_gendisk",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68373.json",
"version": "3"
}
}
}
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