{ "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-2026-90173", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90173", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-17T16:07:00.463Z", "updatedAt": "2026-10-19T08:59:10.504Z", "importedAt": "2026-10-24T01:58:35.090Z", "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": "smb: smbdirect: free completion queues with ib_free_cq()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: smbdirect: free completion queues with ib_free_cq()\n\nsmbdirect_connection_destroy_qp() creates the send and receive completion\nqueues with ib_alloc_cq_any(), which for IB_POLL_WORKQUEUE arms an\ninternal completion handler that runs ib_cq_poll_work() on a workqueue.\nTearing those CQs down with ib_destroy_cq() frees them without first\ncancelling that poll work.\n\nIf the provider posts a completion late -- for example Soft-RoCE (rxe)\nposting an RNR error from rxe_receiver() after rdma_destroy_qp() -- the\nhandler re-queues ib_cq_poll_work() on the already-freed CQ, and a\nfollow-on access faults in rxe_req_notify_cq().\n\nUse ib_free_cq(), which cancel_work_sync()es the poll work before freeing\nthe CQ, so no completion handler can run against a freed queue.\n\n[ 1236.599526] ==================================================================\n[ 1236.602142] BUG: KASAN: slab-use-after-free in ib_cq_poll_work+0xd0/0x1a0\n[ 1236.605524] Read of size 8 at addr ffff888111865800 by task kworker/4:1H/82\n[ 1236.609017]\n[ 1236.609270] CPU: 4 UID: 0 PID: 82 Comm: kworker/4:1H Not tainted 7.2.0-rc3-next-20260717-virtme #110 PREEMPT(lazy)\n[ 1236.609287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n[ 1236.609498] Workqueue: ib-comp-wq ib_cq_poll_work\n[ 1236.609525] Call Trace:\n[ 1236.609536] \n[ 1236.609545] __dump_stack+0x21/0x60\n[ 1236.609562] dump_stack_lvl+0xc2/0x100\n[ 1236.609573] print_address_description+0x77/0x200\n[ 1236.609587] ? ib_cq_poll_work+0xd0/0x1a0\n[ 1236.609597] print_report+0x58/0x70\n[ 1236.609607] kasan_report+0x117/0x150\n[ 1236.609623] ? ib_cq_poll_work+0xd0/0x1a0\n[ 1236.609636] ? process_scheduled_works+0x954/0x1600\n[ 1236.609650] ib_cq_poll_work+0xd0/0x1a0\n[ 1236.609662] ? process_scheduled_works+0x954/0x1600\n[ 1236.609674] process_scheduled_works+0xc22/0x1600\n[ 1236.609698] ? __pfx_process_scheduled_works+0x10/0x10\n[ 1236.609713] ? __pfx_assign_work+0x10/0x10\n[ 1236.609726] ? lock_is_held_type+0x7b/0x110\n[ 1236.609741] worker_thread+0x975/0xee0\n[ 1236.609757] ? __pfx_do_raw_spin_lock+0x10/0x10\n[ 1236.609775] ? __kthread_parkme+0x21e/0x260\n[ 1236.609789] kthread+0x3a6/0x490\n[ 1236.609800] ? __pfx_worker_thread+0x10/0x10\n[ 1236.609809] ? __pfx_kthread+0x10/0x10\n[ 1236.609820] ret_from_fork+0x55a/0xa20\n[ 1236.609835] ? __pfx_ret_from_fork+0x10/0x10\n[ 1236.609850] ? __pfx_kthread+0x10/0x10\n[ 1236.609861] ret_from_fork_asm+0x1a/0x30\n[ 1236.609880] \n[ 1236.609886]\n[ 1236.661292] Allocated by task 5076:\n[ 1236.662640] kasan_save_track+0x3e/0x80\n[ 1236.663842] __kasan_kmalloc+0x72/0x90\n[ 1236.664763] __kmalloc_noprof+0x2b0/0x5d0\n[ 1236.665356] __ib_alloc_cq+0x284/0x1000\n[ 1236.666573] __ib_alloc_cq_any+0x23e/0x340\n[ 1236.668654] smbdirect_connection_create_qp+0x6f7/0x1070\n[ 1236.669757] smbdirect_accept_connect_request+0x500/0x1ca0\n[ 1236.672625] smbdirect_listen_rdma_event_handler+0x1655/0x1c50\n[ 1236.673930] cma_listen_handler+0x1bf/0x260\n[ 1236.674923] cma_cm_event_handler+0x128/0x380\n[ 1236.676926] cma_ib_req_handler+0x2d3d/0x4de0\n[ 1236.678368] cm_process_work+0xb0/0x530\n[ 1236.680454] cm_queue_work_unlock+0xb1/0x230\n[ 1236.681673] cm_work_handler+0x969f/0xdca0\n[ 1236.682704] process_scheduled_works+0xc22/0x1600\n[ 1236.683447] worker_thread+0x975/0xee0\n[ 1236.685901] kthread+0x3a6/0x490\n[ 1236.688164] ret_from_fork+0x55a/0xa20\n[ 1236.689522] ret_from_fork_asm+0x1a/0x30\n[ 1236.690073]\n[ 1236.690378] Freed by task 5137:\n[ 1236.692242] kasan_save_track+0x3e/0x80\n[ 1236.694272] kasan_save_free_info+0x40/0x50\n[ 1236.695514] __kasan_slab_free+0x3a/0x60\n[ 1236.696773] kfree+0x14e/0x4e0\n[ 1236.697216] ib_destroy_cq_user+0x18d/0x250\n[ 1236.699817] smbdirect_connection_destroy_qp+0xf2/0x280\n[ 1236.702115] smbdirect_socket_destroy_sync+0x1607/0x2720\n[ 1236.704062] smbdirect_socket_release+0x140/0x280\n[ 1236.705286] smb_direct_free_transpor\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6073eb3e31756d569c4853fb22724525739d0e0c", "status": "affected", "versionType": "git", "lessThan": "8a953b1a47fffb71e70767bc1e914401e3c2f27f" }, { "version": "6073eb3e31756d569c4853fb22724525739d0e0c", "status": "affected", "versionType": "git", "lessThan": "fe2c0cacbcff9d56c03b296f68f22151c4223b04" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "7.1", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "7.1" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }