CVE-2026-43127

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{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C8B0BDB8-5231-48C2-9E23-019AE9ADD6EF", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.6.66", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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->rw_lock\n(sbi->used.bitmap) and ni->file.run_lock.\n\nThe deadlock scenario:\n1. ntfs_extend_mft() takes ni->file.run_lock then wnd->rw_lock.\n2. run_unpack_ex() takes wnd->rw_lock then tries to acquire\n ni->file.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->rw_lock."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nntfs3: corrige la dependencia de bloqueo circular en run_unpack_ex\n\nSyzbot inform\u00f3 una dependencia de bloqueo circular entre wnd -> rw_lock (sbi -> used.bitmap) y ni -> file.run_lock.\n\nEl escenario de interbloqueo:\n1. ntfs_extend_mft() toma ni -> file.run_lock y luego wnd -> rw_lock.\n2. run_unpack_ex() toma wnd -> rw_lock y luego intenta adquirir ni -> file.run_lock dentro de ntfs_refresh_zone().\n\nEsto crea un interbloqueo AB-BA.\n\nSolucione esto usando down_read_trylock() en lugar de down_read() al adquirir run_lock en run_unpack_ex(). Si el bloqueo est\u00e1 en contenci\u00f3n, omita ntfs_refresh_zone() - la zona MFT se actualizar\u00e1 en la siguiente operaci\u00f3n MFT. Esto rompe la dependencia circular ya que nunca nos bloqueamos esperando run_lock mientras mantenemos wnd -> rw_lock."}], "id": "CVE-2026-43127", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-06T12:16:29.727", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/08ce2fee1b869ecbfbd94e0eb2630e52203a2e03"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/76016d15bbd90caa0ce7765fddf9bde8e943e601"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b014372b62237521444ee51384549bdf48b79015"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b8d22d9d8260b0f4f4d8e2898c98037c9982ea66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d60f09d2d16c44a797d8cb67015cde2508720506"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ntfs3: fix circular locking dependency in run_unpack_ex", "id": "2467158", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467158"}, "csaw": false, "cwe": "CWE-833", "details": ["A flaw was found in the Linux kernel's ntfs3 component. This vulnerability involves a circular locking dependency, also known as an AB-BA deadlock, which can occur when the system attempts to acquire two specific locks in a conflicting order. This issue can cause the system to become unresponsive, leading to a Denial of Service (DoS)."], "name": "CVE-2026-43127", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43127\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43127\nhttps://lore.kernel.org/linux-cve-announce/2026050620-CVE-2026-43127-aa44@gregkh/T"]}

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