{"id":"CVE-2026-92512","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix use after free in ib_query_qp()\n\nWhen querying a QP via the netlink flow the only synchronization\nmechanism for the said QP is rdma_restrack_get(), meanw…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix use after free in ib_query_qp()\n\nWhen querying a QP via the netlink flow the only synchronization\nmechanism for the said QP is rdma_restrack_get(), meanw…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < 2ef2ea52ae41bd9efa83139e97ae839de7e17156","Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < a608af8cde3dd38936b356bbdeedea0653a05b3f","Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < 8998829739c31fdbc892078e4449887d902e5dc9","Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < 038cf231b7099ba6202dcc0c1ea01525122df09f","Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < 001383248e5d754bbddb7ae2a8573bc8501c85d8","Linux >= 514aee660df493cd673154a6ba6bab745ec47b8c < 709ba0e5311bd034eb4d9c1c00cc4e1109d6dc3e","Linux 5.15"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:53.990","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92512","references":[{"url":"https://git.kernel.org/stable/c/001383248e5d754bbddb7ae2a8573bc8501c85d8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/038cf231b7099ba6202dcc0c1ea01525122df09f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2ef2ea52ae41bd9efa83139e97ae839de7e17156","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/709ba0e5311bd034eb4d9c1c00cc4e1109d6dc3e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8998829739c31fdbc892078e4449887d902e5dc9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a608af8cde3dd38936b356bbdeedea0653a05b3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.779Z","epss":0.00173,"epssPercentile":0.06998,"slug":"CVE-2026-92512","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix use after free in ib_query_qp()\n\nWhen querying a QP via the netlink flow the only synchronization\nmechanism for the said QP is rdma_restrack_get(), meanwhile during the\nQP destroy path rdma_restrack_del() is called at the end of the\nib_destroy_qp_user() function which is too late, since by then the\nvendor specific resources for said QP would already be destroyed, and\ntill the rdma_restrack_del() is called this QP can still be accessed,\nwhich could cause the use after free below.\n\nFix this by moving the rdma_restrack_begin_del() to the start of the\nib_destroy_qp_user(), which in turn waits for all usages of the QP to be\ndone then removes it from the database to prevent access to it while it\nis being destroyed.\n\nRIP: 0010:ib_query_qp+0x15/0x50 [ib_core]\nCode: 48 83 05 5d 8e b9 ff 01 eb b5 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 c7 46 40 00 00 00 00 48 c7 46 78 00 00 00 00 <48> 8b 07 48 8b 80 88 01 00 00 48 85 c0 74 1a 48 83 05 54 91 b9 ff\nRSP: 0018:ff11000108a8f2f0 EFLAGS: 00010202\nRAX: 0000000000000000 RBX: ff11000108a8f370 RCX: ff11000108a8f370\nRDX: 0000000000000000 RSI: ff11000108a8f3d8 RDI: 0000000000000000\nRBP: ff1100010de5a000 R08: 0000000000000e80 R09: 0000000000000004\nR10: ff110001057a604c R11: 0000000000000000 R12: ff11000108a8f370\nR13: ff110001090e8000 R14: 0000000000000000 R15: ff110001057a602c\nFS:  00007f2ffd8db6c0(0000) GS:ff110008dc90b000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000000 CR3: 000000010b9a7004 CR4: 0000000000373eb0\nCall Trace:\n <TASK>\n mlx5_ib_gsi_query_qp+0x21/0x50 [mlx5_ib]\n mlx5_ib_query_qp+0x689/0x9d0 [mlx5_ib]\n ib_query_qp+0x35/0x50 [ib_core]\n fill_res_qp_entry_query.isra.0+0x47/0x280 [ib_core]\n ? __wake_up+0x40/0x50\n ? netlink_broadcast_filtered+0x15a/0x550\n ? kobject_uevent_env+0x562/0x710\n ? ep_poll_callback+0x242/0x270\n ? __nla_put+0xc/0x20\n ? nla_put+0x28/0x40\n ? nla_put_string+0x2e/0x40 [ib_core]\n fill_res_qp_entry+0x138/0x190 [ib_core]\n res_get_common_dumpit+0x4a5/0x800 [ib_core]\n ? fill_res_qp_entry_query.isra.0+0x280/0x280 [ib_core]\n nldev_res_get_qp_dumpit+0x1e/0x30 [ib_core]\n netlink_dump+0x16f/0x450\n __netlink_dump_start+0x1ce/0x2e0\n rdma_nl_rcv_msg+0x1d3/0x330 [ib_core]\n ? nldev_res_get_qp_raw_dumpit+0x30/0x30 [ib_core]\n rdma_nl_rcv_skb.constprop.0.isra.0+0x108/0x180 [ib_core]\n rdma_nl_rcv+0x12/0x20 [ib_core]\n netlink_unicast+0x255/0x380\n ? __alloc_skb+0xfa/0x1e0\n netlink_sendmsg+0x1f3/0x420\n __sock_sendmsg+0x38/0x60\n ____sys_sendmsg+0x1e8/0x230\n ? copy_msghdr_from_user+0xea/0x170\n ___sys_sendmsg+0x7c/0xb0\n ? __futex_wait+0x95/0xf0\n ? __futex_wake_mark+0x40/0x40\n ? futex_wait+0x67/0x100\n ? futex_wake+0xac/0x1b0\n __sys_sendmsg+0x5f/0xb0\n do_syscall_64+0x55/0xb90\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}