{"id":"CVE-2026-43127","revision":"64eea267ebb849868b4a4cf0232df5ff","records":[{"revision":"64eea267ebb849868b4a4cf0232df5ff","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43127","aliases":[],"title":"ntfs3: fix circular locking dependency in run_unpack_ex","description":"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.","state":0,"publishedAt":"2026-05-06T11:27:16.794+00:00","modifiedAt":"2026-10-21T12:40:09.954+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ntfs3/run.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"57f7979aefdcef66326bda47e07ee0d8be64bf21\",\n                            \"lessThan\": \"d60f09d2d16c44a797d8cb67015cde2508720506\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db7fc56646cafe39599a4c21f1398e2bdfd5c185\",\n                            \"lessThan\": \"76016d15bbd90caa0ce7765fddf9bde8e943e601\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36\",\n                            \"lessThan\": \"b014372b62237521444ee51384549bdf48b79015\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36\",\n                            \"lessThan\": \"b8d22d9d8260b0f4f4d8e2898c98037c9982ea66\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36\",\n                            \"lessThan\": \"08ce2fee1b869ecbfbd94e0eb2630e52203a2e03\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.66\",\n                            \"lessThan\": \"6.6.160\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.5\",\n                            \"lessThan\": \"6.12.114\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ntfs3/run.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.16\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.6\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/d60f09d2d16c44a797d8cb67015cde2508720506","https://git.kernel.org/stable/c/76016d15bbd90caa0ce7765fddf9bde8e943e601","https://git.kernel.org/stable/c/b014372b62237521444ee51384549bdf48b79015","https://git.kernel.org/stable/c/b8d22d9d8260b0f4f4d8e2898c98037c9982ea66","https://git.kernel.org/stable/c/08ce2fee1b869ecbfbd94e0eb2630e52203a2e03"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43127","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43127","identifiers":["CVE-2026-43127"]},"retained":false,"historicalAffected":[]}],"coverage":[]}