SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed

{
  "id": "6326de4a4c187ab69c49c1bb68215581797134273d729710224dc14319064f54",
  "url": "https://osv.dev/vulnerability/CVE-2022-49928",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed There is a null-ptr-deref when xps sysfs alloc failed: BUG: KASAN: null-ptr-deref in sysfs_do_create_link_sd+0x40/0xd0 Read of size 8 at addr 0000000000000030 by task gssproxy/457 CPU: 5 PID: 457 Comm: gssproxy Not tainted 6.0.0-09040-g02357b27ee03 #9 Call Trace: dump_stack_lvl+0x34/0x44 kasan_report+0xa3/0x120 sysfs_do_create_link_sd+0x40/0xd0 rpc_sysfs_client_setup+0x161/0x1b0 rpc_new_client+0x3fc/0x6e0 rpc_create_xprt+0x71/0x220 rpc_create+0x1d4/0x350 gssp_rpc_create+0xc3/0x160 set_gssp_clnt+0xbc/0x140 write_gssp+0x116/0x1a0 proc_reg_write+0xd6/0x130 vfs_write+0x177/0x690 ksys_write+0xb9/0x150 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 When the xprt_switch sysfs alloc failed, should not add xprt and switch sysfs to it, otherwise, maybe null-ptr-deref; also initialize the 'xps_sysfs' to NULL to avoid oops when destroy it.",
    "evidence": "osv:CVE-2022-49928",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49928",
      "aliases": [
        "CVE-2022-49928"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "baea99445dd4675a834e8a5987d2f368adb62e6c"
                },
                {
                  "fixed": "d59722d088a9d86ce6d9d39979e5d1d669d249f7"
                },
                {
                  "fixed": "7b189b0aa8dab14b49c31c65af8a982e96e25b62"
                },
                {
                  "fixed": "cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49928.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.78"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.0.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49928.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.635981202Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/7b189b0aa8dab14b49c31c65af8a982e96e25b62",
        "https://git.kernel.org/stable/c/cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a",
        "https://git.kernel.org/stable/c/d59722d088a9d86ce6d9d39979e5d1d669d249f7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49928.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49928",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49928.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49928",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507905,
  "published_at": "2025-05-01T14:11:06.068+00:00"
}