{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90172", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.791Z", "datePublished": "2026-09-17T16:06:59.794Z", "dateUpdated": "2026-09-17T16:06:59.794Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-17T16:06:59.794Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: smbdirect: destroy QP before mem pools on accept failure\n\nOn the rdma_accept_failed error path of\nsmbdirect_accept_connect_request(), the receive io posted just above is\nowned by the QP (recv_io is set to NULL after a successful post). The\nerror path fell through to smbdirect_connection_destroy_mem_pools()\nbefore smbdirect_connection_destroy_qp(), so the mem pools and the\nrecv_io slab cache were destroyed while that recv_io was still\noutstanding on the QP.\n\nThe drain in smbdirect_connection_destroy_qp() (ib_drain_qp()) is what\nruns the recv completion that returns the recv_io to the free list, so\ndestroying the pools first leaves the object outstanding at\nkmem_cache_destroy() time (\"Slab cache still has objects\") and later\nfrees it into an already-destroyed mempool (mempool_free_bulk\nNULL-pointer dereference).\n\nGive rdma_accept_failed its own teardown that drains the QP first, then\ndestroys the mem pools, and returns. The remaining labels\n(post_recv_io_failed onward) run before the recv_io was ever posted, so\nthey keep the mem-pools-then-qp order.\n\nThe outstanding recv_io at kmem_cache_destroy() time:\n\n[ 3487.344647] =============================================================================\n[ 3487.349942] BUG smbdirect_recv_io_cache_ffff88811ba99000 (Not tainted): Objects remaining on __kmem_cache_shutdown()\n[ 3487.356078] -----------------------------------------------------------------------------\n[ 3487.356078]\n[ 3487.356738] Object 0xffff8881511c3440 @offset=13376\n[ 3487.358464] Allocated in mempool_alloc_noprof+0x18c/0x290 age=1194 cpu=6 pid=22254\n[ 3487.361197] mempool_alloc_noprof+0x18c/0x290\n[ 3487.361542] smbdirect_connection_create_mem_pools+0x405/0x780\n[ 3487.361972] smbdirect_accept_connect_request+0x5a8/0x1b80\n[ 3487.362359] smbdirect_listen_rdma_event_handler+0x1579/0x1b90\n[ 3487.362779] cma_cm_event_handler+0x9c/0x230\n[ 3487.363096] cma_ib_req_handler+0x2682/0x45d0\n[ 3487.363414] cm_process_work+0x56/0x3d0\n[ 3487.363676] cm_work_handler+0x8a0e/0xd000\n[ 3487.367496] process_scheduled_works+0xa07/0x13a0\n[ 3487.367859] worker_thread+0x7c9/0xc80\n[ 3487.368148] kthread+0x341/0x430\n[ 3487.368407] ret_from_fork+0x3a8/0x7a0\n[ 3487.368704] ret_from_fork_asm+0x1a/0x30\n[ 3487.370307] Slab 0xffffea0005447000 objects=19 used=1 fp=0xffff8881511c0040 flags=0x100000000000240(workingset|head|node=0|zone=2)\n[ 3487.372840] ------------[ cut here ]------------\n[ 3487.373195] WARNING: mm/slub.c:1244 at __slab_err+0x1a/0x30, CPU#6: kworker/6:84/22254\n[ 3487.373759] Modules linked in:\n[ 3487.373993] CPU: 6 UID: 0 PID: 22254 Comm: kworker/6:84 Tainted: G B 7.1.0-next-20260623+ #88 PREEMPT(lazy)\n[ 3487.374778] Tainted: [B]=BAD_PAGE\n[ 3487.377830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n[ 3487.378515] Workqueue: ib_cm cm_work_handler\n[ 3487.378820] RIP: 0010:__slab_err+0x1a/0x30\n[ 3487.379129] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 e8 36 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 f7 75 45 00 90 <0f> 0b 90 c3 cc cc cc cc cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00\n[ 3487.383255] RSP: 0018:ffff888220fc7050 EFLAGS: 00010093\n[ 3487.383643] RAX: ffffffff8168e60a RBX: ffff88810955e640 RCX: ffff88821c381d80\n[ 3487.384158] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff870fa080\n[ 3487.384662] RBP: ffff888220fc7068 R08: ffffffff870fa087 R09: 1ffffffff0e1f410\n[ 3487.385192] R10: dffffc0000000000 R11: fffffbfff0e1f411 R12: ffffea0005447210\n[ 3487.385674] R13: ffffea0005447000 R14: ffff888220fc7068 R15: ffff88812a8ab300\n[ 3487.388932] FS: 0000000000000000(0000) GS:ffff888427e76000(0000) knlGS:0000000000000000\n[ 3487.389529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 3487.389934] CR2: 00007ffcf2d84fd8 CR3: 0000000111d64006 CR4: 0000000000f72ef0\n[ 3487.390440] PKRU: 55555554\n[ 3487.390641] Call Trace:\n[ 3487.390826] <TASK>\n[ 3\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/smbdirect/accept.c"], "versions": [{"version": "eb3ed1e9048cf7b2a38112f48e0f1b772bb7860d", "lessThan": "959813a3752b459ed77b0b3eaf30b9f4c6204260", "status": "affected", "versionType": "git"}, {"version": "eb3ed1e9048cf7b2a38112f48e0f1b772bb7860d", "lessThan": "383a9480f5f40bc46454cce27ccfad532cedad9c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/smbdirect/accept.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/959813a3752b459ed77b0b3eaf30b9f4c6204260"}, {"url": "https://git.kernel.org/stable/c/383a9480f5f40bc46454cce27ccfad532cedad9c"}], "title": "smb: smbdirect: destroy QP before mem pools on accept failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/smbdirect/accept.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "959813a3752b459ed77b0b3eaf30b9f4c6204260", "status": "affected", "version": "eb3ed1e9048cf7b2a38112f48e0f1b772bb7860d", "versionType": "git"}, {"lessThan": "383a9480f5f40bc46454cce27ccfad532cedad9c", "status": "affected", "version": "eb3ed1e9048cf7b2a38112f48e0f1b772bb7860d", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/smbdirect/accept.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: smbdirect: destroy QP before mem pools on accept failure\n\nOn the rdma_accept_failed error path of\nsmbdirect_accept_connect_request(), the receive io posted just above is\nowned by the QP (recv_io is set to NULL after a successful post). The\nerror path fell through to smbdirect_connection_destroy_mem_pools()\nbefore smbdirect_connection_destroy_qp(), so the mem pools and the\nrecv_io slab cache were destroyed while that recv_io was still\noutstanding on the QP.\n\nThe drain in smbdirect_connection_destroy_qp() (ib_drain_qp()) is what\nruns the recv completion that returns the recv_io to the free list, so\ndestroying the pools first leaves the object outstanding at\nkmem_cache_destroy() time (\"Slab cache still has objects\") and later\nfrees it into an already-destroyed mempool (mempool_free_bulk\nNULL-pointer dereference).\n\nGive rdma_accept_failed its own teardown that drains the QP first, then\ndestroys the mem pools, and returns. The remaining labels\n(post_recv_io_failed onward) run before the recv_io was ever posted, so\nthey keep the mem-pools-then-qp order.\n\nThe outstanding recv_io at kmem_cache_destroy() time:\n\n[ 3487.344647] =============================================================================\n[ 3487.349942] BUG smbdirect_recv_io_cache_ffff88811ba99000 (Not tainted): Objects remaining on __kmem_cache_shutdown()\n[ 3487.356078] -----------------------------------------------------------------------------\n[ 3487.356078]\n[ 3487.356738] Object 0xffff8881511c3440 @offset=13376\n[ 3487.358464] Allocated in mempool_alloc_noprof+0x18c/0x290 age=1194 cpu=6 pid=22254\n[ 3487.361197] mempool_alloc_noprof+0x18c/0x290\n[ 3487.361542] smbdirect_connection_create_mem_pools+0x405/0x780\n[ 3487.361972] smbdirect_accept_connect_request+0x5a8/0x1b80\n[ 3487.362359] smbdirect_listen_rdma_event_handler+0x1579/0x1b90\n[ 3487.362779] cma_cm_event_handler+0x9c/0x230\n[ 3487.363096] cma_ib_req_handler+0x2682/0x45d0\n[ 3487.363414] cm_process_work+0x56/0x3d0\n[ 3487.363676] cm_work_handler+0x8a0e/0xd000\n[ 3487.367496] process_scheduled_works+0xa07/0x13a0\n[ 3487.367859] worker_thread+0x7c9/0xc80\n[ 3487.368148] kthread+0x341/0x430\n[ 3487.368407] ret_from_fork+0x3a8/0x7a0\n[ 3487.368704] ret_from_fork_asm+0x1a/0x30\n[ 3487.370307] Slab 0xffffea0005447000 objects=19 used=1 fp=0xffff8881511c0040 flags=0x100000000000240(workingset|head|node=0|zone=2)\n[ 3487.372840] ------------[ cut here ]------------\n[ 3487.373195] WARNING: mm/slub.c:1244 at __slab_err+0x1a/0x30, CPU#6: kworker/6:84/22254\n[ 3487.373759] Modules linked in:\n[ 3487.373993] CPU: 6 UID: 0 PID: 22254 Comm: kworker/6:84 Tainted: G B 7.1.0-next-20260623+ #88 PREEMPT(lazy)\n[ 3487.374778] Tainted: [B]=BAD_PAGE\n[ 3487.377830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n[ 3487.378515] Workqueue: ib_cm cm_work_handler\n[ 3487.378820] RIP: 0010:__slab_err+0x1a/0x30\n[ 3487.379129] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 e8 36 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 f7 75 45 00 90 <0f> 0b 90 c3 cc cc cc cc cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00\n[ 3487.383255] RSP: 0018:ffff888220fc7050 EFLAGS: 00010093\n[ 3487.383643] RAX: ffffffff8168e60a RBX: ffff88810955e640 RCX: ffff88821c381d80\n[ 3487.384158] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff870fa080\n[ 3487.384662] RBP: ffff888220fc7068 R08: ffffffff870fa087 R09: 1ffffffff0e1f410\n[ 3487.385192] R10: dffffc0000000000 R11: fffffbfff0e1f411 R12: ffffea0005447210\n[ 3487.385674] R13: ffffea0005447000 R14: ffff888220fc7068 R15: ffff88812a8ab300\n[ 3487.388932] FS: 0000000000000000(0000) GS:ffff888427e76000(0000) knlGS:0000000000000000\n[ 3487.389529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 3487.389934] CR2: 00007ffcf2d84fd8 CR3: 0000000111d64006 CR4: 0000000000f72ef0\n[ 3487.390440] PKRU: 55555554\n[ 3487.390641] Call Trace:\n[ 3487.390826] <TASK>\n[ 3\n---truncated---"}], "id": "CVE-2026-90172", "lastModified": "2026-09-17T17:17:10.820", "metrics": {}, "published": "2026-09-17T17:17:10.820", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/383a9480f5f40bc46454cce27ccfad532cedad9c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/959813a3752b459ed77b0b3eaf30b9f4c6204260"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}