CVE-2026-43127 (GCVE-0-2026-43127)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-10-21 12:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
ntfs3: fix circular locking dependency in run_unpack_ex
Syzbot reported a circular locking dependency between wnd->rw_lock
(sbi->used.bitmap) and ni->file.run_lock.
The deadlock scenario:
1. ntfs_extend_mft() takes ni->file.run_lock then wnd->rw_lock.
2. run_unpack_ex() takes wnd->rw_lock then tries to acquire
ni->file.run_lock inside ntfs_refresh_zone().
This creates an AB-BA deadlock.
Fix this by using down_read_trylock() instead of down_read() when
acquiring run_lock in run_unpack_ex(). If the lock is contended,
skip ntfs_refresh_zone() - the MFT zone will be refreshed on the
next MFT operation. This breaks the circular dependency since we
never block waiting for run_lock while holding wnd->rw_lock.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 57f7979aefdcef66326bda47e07ee0d8be64bf21 Version: db7fc56646cafe39599a4c21f1398e2bdfd5c185 Version: 5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36 Version: 5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36 Version: 5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36 Version: 6.6.66 ≤ Version: 6.12.5 ≤ |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/ntfs3/run.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d60f09d2d16c44a797d8cb67015cde2508720506",
"status": "affected",
"version": "57f7979aefdcef66326bda47e07ee0d8be64bf21",
"versionType": "git"
},
{
"lessThan": "76016d15bbd90caa0ce7765fddf9bde8e943e601",
"status": "affected",
"version": "db7fc56646cafe39599a4c21f1398e2bdfd5c185",
"versionType": "git"
},
{
"lessThan": "b014372b62237521444ee51384549bdf48b79015",
"status": "affected",
"version": "5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36",
"versionType": "git"
},
{
"lessThan": "b8d22d9d8260b0f4f4d8e2898c98037c9982ea66",
"status": "affected",
"version": "5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36",
"versionType": "git"
},
{
"lessThan": "08ce2fee1b869ecbfbd94e0eb2630e52203a2e03",
"status": "affected",
"version": "5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36",
"versionType": "git"
},
{
"lessThan": "6.6.160",
"status": "affected",
"version": "6.6.66",
"versionType": "semver"
},
{
"lessThan": "6.12.114",
"status": "affected",
"version": "6.12.5",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/ntfs3/run.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"lessThan": "6.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.160",
"versionStartIncluding": "6.6.66",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.114",
"versionStartIncluding": "6.12.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.16",
"versionStartIncluding": "6.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.6",
"versionStartIncluding": "6.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0",
"versionStartIncluding": "6.13",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix circular locking dependency in run_unpack_ex\n\nSyzbot reported a circular locking dependency between wnd-\u003erw_lock\n(sbi-\u003eused.bitmap) and ni-\u003efile.run_lock.\n\nThe deadlock scenario:\n1. ntfs_extend_mft() takes ni-\u003efile.run_lock then wnd-\u003erw_lock.\n2. run_unpack_ex() takes wnd-\u003erw_lock then tries to acquire\n ni-\u003efile.run_lock inside ntfs_refresh_zone().\n\nThis creates an AB-BA deadlock.\n\nFix this by using down_read_trylock() instead of down_read() when\nacquiring run_lock in run_unpack_ex(). If the lock is contended,\nskip ntfs_refresh_zone() - the MFT zone will be refreshed on the\nnext MFT operation. This breaks the circular dependency since we\nnever block waiting for run_lock while holding wnd-\u003erw_lock."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-21T12:40:09.954Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d60f09d2d16c44a797d8cb67015cde2508720506"
},
{
"url": "https://git.kernel.org/stable/c/76016d15bbd90caa0ce7765fddf9bde8e943e601"
},
{
"url": "https://git.kernel.org/stable/c/b014372b62237521444ee51384549bdf48b79015"
},
{
"url": "https://git.kernel.org/stable/c/b8d22d9d8260b0f4f4d8e2898c98037c9982ea66"
},
{
"url": "https://git.kernel.org/stable/c/08ce2fee1b869ecbfbd94e0eb2630e52203a2e03"
}
],
"title": "ntfs3: fix circular locking dependency in run_unpack_ex",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43127",
"datePublished": "2026-05-06T11:27:16.794Z",
"dateReserved": "2026-05-01T14:12:55.988Z",
"dateUpdated": "2026-10-21T12:40:09.954Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…