{"cve":"CVE-2024-47694","nvd":{"published":"2024-10-21T12:15:06.107","modified":"2026-06-17T07:57:33.477","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix UMR pd cleanup on error flow of driver init\n\nThe cited commit moves the pd allocation from function\nmlx5r_umr_resource_cleanup() to a new function mlx5r_umr_cleanup().\nSo the fix in commit [1] is broken. In error flow, will hit panic [2].\n\nFix it by checking pd pointer to avoid panic if it is NULL;\n\n[1] RDMA/mlx5: Fix UMR cleanup on error flow of driver init\n[2]\n [  347.567063] infiniband mlx5_0: Couldn't register device with driver model\n [  347.591382] BUG: kernel NULL pointer dereference, address: 0000000000000020\n [  347.593438] #PF: supervisor read access in kernel mode\n [  347.595176] #PF: error_code(0x0000) - not-present page\n [  347.596962] PGD 0 P4D 0\n [  347.601361] RIP: 0010:ib_dealloc_pd_user+0x12/0xc0 [ib_core]\n [  347.604171] RSP: 0018:ffff888106293b10 EFLAGS: 00010282\n [  347.604834] RAX: 0000000000000000 RBX: 000000000000000e RCX: 0000000000000000\n [  347.605672] RDX: ffff888106293ad0 RSI: 0000000000000000 RDI: 0000000000000000\n [  347.606529] RBP: 0000000000000000 R08: ffff888106293ae0 R09: ffff888106293ae0\n [  347.607379] R10: 0000000000000a06 R11: 0000000000000000 R12: 0000000000000000\n [  347.608224] R13: ffffffffa0704dc0 R14: 0000000000000001 R15: 0000000000000001\n [  347.609067] FS:  00007fdc720cd9c0(0000) GS:ffff88852c880000(0000) knlGS:0000000000000000\n [  347.610094] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n [  347.610727] CR2: 0000000000000020 CR3: 0000000103012003 CR4: 0000000000370eb0\n [  347.611421] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n [  347.612113] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n [  347.612804] Call Trace:\n [  347.613130]  <TASK>\n [  347.613417]  ? __die+0x20/0x60\n [  347.613793]  ? page_fault_oops+0x150/0x3e0\n [  347.614243]  ? free_msg+0x68/0x80 [mlx5_core]\n [  347.614840]  ? cmd_exec+0x48f/0x11d0 [mlx5_core]\n [  347.615359]  ? exc_page_fault+0x74/0x130\n [  347.615808]  ? asm_exc_page_fault+0x22/0x30\n [  347.616273]  ? ib_dealloc_pd_user+0x12/0xc0 [ib_core]\n [  347.616801]  mlx5r_umr_cleanup+0x23/0x90 [mlx5_ib]\n [  347.617365]  mlx5_ib_stage_pre_ib_reg_umr_cleanup+0x36/0x40 [mlx5_ib]\n [  347.618025]  __mlx5_ib_add+0x96/0xd0 [mlx5_ib]\n [  347.618539]  mlx5r_probe+0xe9/0x310 [mlx5_ib]\n [  347.619032]  ? kernfs_add_one+0x107/0x150\n [  347.619478]  ? __mlx5_ib_add+0xd0/0xd0 [mlx5_ib]\n [  347.619984]  auxiliary_bus_probe+0x3e/0x90\n [  347.620448]  really_probe+0xc5/0x3a0\n [  347.620857]  __driver_probe_device+0x80/0x160\n [  347.621325]  driver_probe_device+0x1e/0x90\n [  347.621770]  __driver_attach+0xec/0x1c0\n [  347.622213]  ? __device_attach_driver+0x100/0x100\n [  347.622724]  bus_for_each_dev+0x71/0xc0\n [  347.623151]  bus_add_driver+0xed/0x240\n [  347.623570]  driver_register+0x58/0x100\n [  347.623998]  __auxiliary_driver_register+0x6a/0xc0\n [  347.624499]  ? driver_register+0xae/0x100\n [  347.624940]  ? 0xffffffffa0893000\n [  347.625329]  mlx5_ib_init+0x16a/0x1e0 [mlx5_ib]\n [  347.625845]  do_one_initcall+0x4a/0x2a0\n [  347.626273]  ? gcov_event+0x2e2/0x3a0\n [  347.626706]  do_init_module+0x8a/0x260\n [  347.627126]  init_module_from_file+0x8b/0xd0\n [  347.627596]  __x64_sys_finit_module+0x1ca/0x2f0\n [  347.628089]  do_syscall_64+0x4c/0x100","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/112e6e83a894260cc7efe79a1fc47d4d51461742","https://git.kernel.org/stable/c/99e2de5942b0390ddc24efada71edc6593e23f05"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:56:33.105311382+00:00"},"epss":{"cve":"CVE-2024-47694","score":0.00202,"percentile":0.10134,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}