{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-46050", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46050", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-05-27T12:57:06.732Z", "updatedAt": "2026-10-15T01:20:14.500Z", "importedAt": "2026-10-24T01:58:14.884Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "md/raid10: fix deadlock with check operation and nowait requests", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: fix deadlock with check operation and nowait requests\n\nWhen an array check is running it will raise the barrier at which point\nnormal requests will become blocked and increment the nr_pending value to\nsignal there is work pending inside of wait_barrier(). NOWAIT requests\ndo not block and so will return immediately with an error, and additionally\ndo not increment nr_pending in wait_barrier(). Upstream change commit\n43806c3d5b9b (\"raid10: cleanup memleak at raid10_make_request\") added a\ncall to raid_end_bio_io() to fix a memory leak when NOWAIT requests hit\nthis condition. raid_end_bio_io() eventually calls allow_barrier() and\nit will unconditionally do an atomic_dec_and_test(&conf->nr_pending) even\nthough the corresponding increment on nr_pending didn't happen in the\nNOWAIT case.\n\nThis can be easily seen by starting a check operation while an application\nis doing nowait IO on the same array. This results in a deadlocked state\ndue to nr_pending value underflowing and so the md resync thread gets stuck\nwaiting for nr_pending to == 0.\n\nOutput of r10conf state of the array when we hit this condition:\n\ncrash> struct r10conf\n\tbarrier = 1,\n nr_pending = {\n counter = -41\n },\n nr_waiting = 15,\n nr_queued = 0,\n\nExample of md_sync thread stuck waiting on raise_barrier() and other\nrequests stuck in wait_barrier():\n\nmd1_resync\n[<0>] raise_barrier+0xce/0x1c0\n[<0>] raid10_sync_request+0x1ca/0x1ed0\n[<0>] md_do_sync+0x779/0x1110\n[<0>] md_thread+0x90/0x160\n[<0>] kthread+0xbe/0xf0\n[<0>] ret_from_fork+0x34/0x50\n[<0>] ret_from_fork_asm+0x1a/0x30\n\nkworker/u1040:2+flush-253:4\n[<0>] wait_barrier+0x1de/0x220\n[<0>] regular_request_wait+0x30/0x180\n[<0>] raid10_make_request+0x261/0x1000\n[<0>] md_handle_request+0x13b/0x230\n[<0>] __submit_bio+0x107/0x1f0\n[<0>] submit_bio_noacct_nocheck+0x16f/0x390\n[<0>] ext4_io_submit+0x24/0x40\n[<0>] ext4_do_writepages+0x254/0xc80\n[<0>] ext4_writepages+0x84/0x120\n[<0>] do_writepages+0x7a/0x260\n[<0>] __writeback_single_inode+0x3d/0x300\n[<0>] writeback_sb_inodes+0x1dd/0x470\n[<0>] __writeback_inodes_wb+0x4c/0xe0\n[<0>] wb_writeback+0x18b/0x2d0\n[<0>] wb_workfn+0x2a1/0x400\n[<0>] process_one_work+0x149/0x330\n[<0>] worker_thread+0x2d2/0x410\n[<0>] kthread+0xbe/0xf0\n[<0>] ret_from_fork+0x34/0x50\n[<0>] ret_from_fork_asm+0x1a/0x30", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "10c6021a609deb95f23f0cc2f89aa9d4bffb14c7", "status": "affected", "versionType": "git", "lessThan": "2249983d971e6839b36284e6610390b2c217dfa1" }, { "version": "9af149ca9d0dab6e59e813519d309eff62499864", "status": "affected", "versionType": "git", "lessThan": "ae356d5eb1331d678985799f893e436314834a87" }, { "version": "8fc3d7b23d139e3cbc944c15d99b3cdbed797d2d", "status": "affected", "versionType": "git", "lessThan": "965d6162dd88cc7cc193cf7f5bfc132d8bbf0523" }, { "version": "2941155d9a5ae098b480d551f3a5f8605d4f9af5", "status": "affected", "versionType": "git", "lessThan": "42fe37c90184cd1568838b84b488934c3671c963" }, { "version": "43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24", "status": "affected", "versionType": "git", "lessThan": "cac2106bb9a2180b288079b49ed626414fb5bc45" }, { "version": "43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24", "status": "affected", "versionType": "git", "lessThan": "1cdff2937c618f81058422bbdc4974a3e7ec9379" }, { "version": "43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24", "status": "affected", "versionType": "git", "lessThan": "7d96f3120a7fb7210d21b520c5b6f495da6ba436" }, { "version": "ed7bcd9f617e4107ac0813c516e72e6b8f6029bd", "status": "affected", "versionType": "git" }, { "version": "5.15.189", "status": "affected", "versionType": "semver", "lessThan": "5.15.209" }, { "version": "6.1.146", "status": "affected", "versionType": "semver", "lessThan": "6.1.175" }, { "version": "6.6.99", "status": "affected", "versionType": "semver", "lessThan": "6.6.140" }, { "version": "6.12.39", "status": "affected", "versionType": "semver", "lessThan": "6.12.86" }, { "version": "6.15.7", "status": "affected", "versionType": "semver", "lessThan": "6.16" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.16", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.16" }, { "version": "5.15.209", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.175", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.140", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.86", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.27", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.0.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.0.*" }, { "version": "7.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }