CVE-2022-49930 (GCVE-0-2022-49930)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:11 – Updated: 2026-05-11 19:09
VLAI
Title
RDMA/hns: Fix NULL pointer problem in free_mr_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix NULL pointer problem in free_mr_init() Lock grab occurs in a concurrent scenario, resulting in stepping on a NULL pointer. It should be init mutex_init() first before use the lock. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: __mutex_lock.constprop.0+0xd0/0x5c0 __mutex_lock_slowpath+0x1c/0x2c mutex_lock+0x44/0x50 free_mr_send_cmd_to_hw+0x7c/0x1c0 [hns_roce_hw_v2] hns_roce_v2_dereg_mr+0x30/0x40 [hns_roce_hw_v2] hns_roce_dereg_mr+0x4c/0x130 [hns_roce_hw_v2] ib_dereg_mr_user+0x54/0x124 uverbs_free_mr+0x24/0x30 destroy_hw_idr_uobject+0x38/0x74 uverbs_destroy_uobject+0x48/0x1c4 uobj_destroy+0x74/0xcc ib_uverbs_cmd_verbs+0x368/0xbb0 ib_uverbs_ioctl+0xec/0x1a4 __arm64_sys_ioctl+0xb4/0x100 invoke_syscall+0x50/0x120 el0_svc_common.constprop.0+0x58/0x190 do_el0_svc+0x30/0x90 el0_svc+0x2c/0xb4 el0t_64_sync_handler+0x1a4/0x1b0 el0t_64_sync+0x19c/0x1a0
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 14:56 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 70f92521584f1d1e8268311ee84413307b0fdea8 , < 0e23e85d86b78e734dd6654f1b69fbaeb5534c81 (git)
Affected: 70f92521584f1d1e8268311ee84413307b0fdea8 , < 12bcaf87d8b66d8cd812479c8a6349dcb245375c (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/infiniband/hw/hns/hns_roce_hw_v2.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.18"
                },
                {
                  "lessThan": "5.18",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
                  "version": "6.0.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.0.8",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:49:06.139Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/0e23e85d86b78e734dd6654f1b69fbaeb5534c81"
            },
            {
              "url": "https://git.kernel.org/stable/c/12bcaf87d8b66d8cd812479c8a6349dcb245375c"
            }
          ],
          "title": "RDMA/hns: Fix NULL pointer problem in free_mr_init()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49930",
        "datePublished": "2025-05-01T14:11:07.408Z",
        "dateReserved": "2025-05-01T14:05:17.254Z",
        "dateUpdated": "2025-10-01T14:56:06.644Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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