{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "31da94c25aea835ceac00575a9fd206c5a833fed"
            },
            {
              "fixed": "ac00301adb19df54f2eae1efc4bad7447c0156ce"
            },
            {
              "fixed": "879fabc5a95401d9bce357e4b1d24ae4a360a81f"
            },
            {
              "fixed": "7e1864332fbc1b993659eab7974da9fe8bf8c128"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.14.0"
            },
            {
              "fixed": "5.15.82"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49001.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: fix race when vmap stack overflow\n\nCurrently, when detecting vmap stack overflow, riscv firstly switches\nto the so called shadow stack, then use this shadow stack to call the\nget_overflow_stack() to get the overflow stack. However, there's\na race here if two or more harts use the same shadow stack at the same\ntime.\n\nTo solve this race, we introduce spin_shadow_stack atomic var, which\nwill be swap between its own address and 0 in atomic way, when the\nvar is set, it means the shadow_stack is being used; when the var\nis cleared, it means the shadow_stack isn't being used.\n\n[Palmer: Add AQ to the swap, and also some comments.]",
  "id": "CVE-2022-49001",
  "modified": "2026-08-12T03:51:17.791373284Z",
  "published": "2024-10-21T20:06:15.443Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156ce"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49001.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49001"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "riscv: fix race when vmap stack overflow"
}