{"cve":"CVE-2022-49930","nvd":{"published":"2025-05-01T15:16:18.983","modified":"2026-06-17T05:19:33.617","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hns: Fix NULL pointer problem in free_mr_init()\n\nLock grab occurs in a concurrent scenario, resulting in stepping on a NULL\npointer.  It should be init mutex_init() first before use the lock.\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n  Call trace:\n   __mutex_lock.constprop.0+0xd0/0x5c0\n   __mutex_lock_slowpath+0x1c/0x2c\n   mutex_lock+0x44/0x50\n   free_mr_send_cmd_to_hw+0x7c/0x1c0 [hns_roce_hw_v2]\n   hns_roce_v2_dereg_mr+0x30/0x40 [hns_roce_hw_v2]\n   hns_roce_dereg_mr+0x4c/0x130 [hns_roce_hw_v2]\n   ib_dereg_mr_user+0x54/0x124\n   uverbs_free_mr+0x24/0x30\n   destroy_hw_idr_uobject+0x38/0x74\n   uverbs_destroy_uobject+0x48/0x1c4\n   uobj_destroy+0x74/0xcc\n   ib_uverbs_cmd_verbs+0x368/0xbb0\n   ib_uverbs_ioctl+0xec/0x1a4\n   __arm64_sys_ioctl+0xb4/0x100\n   invoke_syscall+0x50/0x120\n   el0_svc_common.constprop.0+0x58/0x190\n   do_el0_svc+0x30/0x90\n   el0_svc+0x2c/0xb4\n   el0t_64_sync_handler+0x1a4/0x1b0\n   el0t_64_sync+0x19c/0x1a0","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/0e23e85d86b78e734dd6654f1b69fbaeb5534c81","https://git.kernel.org/stable/c/12bcaf87d8b66d8cd812479c8a6349dcb245375c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2022-49930","score":0.00159,"percentile":0.04997,"date":"2026-10-31"},"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."]}