{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd"
            },
            {
              "fixed": "87b9685cca91ed715c39ba544715832d26a7f4b4"
            },
            {
              "fixed": "131ec9046e1c8af101aebdaec4e8095e05f3312b"
            },
            {
              "fixed": "67fd62e3efdc9dce01f76d95a745212f4feb38e6"
            },
            {
              "fixed": "45cbaf5c7cdc5386d86377f0daf94a17a007fed0"
            },
            {
              "fixed": "98a0a81ce78020c2522e0046f49d200de9778cb9"
            },
            {
              "fixed": "07e9e674b6146b1f6fc41b1f54b8968bf2802824"
            },
            {
              "fixed": "2145c71a8044362e82e9923f001ba2aeb771b848"
            },
            {
              "fixed": "fcd1d70792a35c8a97414fe429f48311e41269c2"
            },
            {
              "fixed": "3b7da2b4d0fe014eff181ed37e3bf832eb8ed258"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.20.0"
            },
            {
              "fixed": "7.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31576.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: hackrf: fix to not free memory after the device is registered in hackrf_probe()\n\nIn hackrf driver, the following race condition occurs:\n```\n\t\tCPU0\t\t\t\t\t\tCPU1\nhackrf_probe()\n  kzalloc(); // alloc hackrf_dev\n  ....\n  v4l2_device_register();\n  ....\n\t\t\t\t\t\tfd = sys_open(\"/path/to/dev\"); // open hackrf fd\n\t\t\t\t\t\t....\n  v4l2_device_unregister();\n  ....\n  kfree(); // free hackrf_dev\n  ....\n\t\t\t\t\t\tsys_ioctl(fd, ...);\n\t\t\t\t\t\t  v4l2_ioctl();\n\t\t\t\t\t\t    video_is_registered() // UAF!!\n\t\t\t\t\t\t....\n\t\t\t\t\t\tsys_close(fd);\n\t\t\t\t\t\t  v4l2_release() // UAF!!\n\t\t\t\t\t\t    hackrf_video_release()\n\t\t\t\t\t\t      kfree(); // DFB!!\n```\n\nWhen a V4L2 or video device is unregistered, the device node is removed so\nnew open() calls are blocked.\n\nHowever, file descriptors that are already open-and any in-flight I/O-do\nnot terminate immediately; they remain valid until the last reference is\ndropped and the driver's release() is invoked.\n\nTherefore, freeing device memory on the error path after hackrf_probe()\nhas registered dev it will lead to a race to use-after-free vuln, since\nthose already-open handles haven't been released yet.\n\nAnd since release() free memory too, race to use-after-free and\ndouble-free vuln occur.\n\nTo prevent this, if device is registered from probe(), it should be\nmodified to free memory only through release() rather than calling\nkfree() directly.",
  "id": "CVE-2026-31576",
  "modified": "2026-07-15T01:49:06.028471686Z",
  "published": "2026-04-24T14:42:08.188Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07e9e674b6146b1f6fc41b1f54b8968bf2802824"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/131ec9046e1c8af101aebdaec4e8095e05f3312b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2145c71a8044362e82e9923f001ba2aeb771b848"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b7da2b4d0fe014eff181ed37e3bf832eb8ed258"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45cbaf5c7cdc5386d86377f0daf94a17a007fed0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67fd62e3efdc9dce01f76d95a745212f4feb38e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87b9685cca91ed715c39ba544715832d26a7f4b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98a0a81ce78020c2522e0046f49d200de9778cb9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcd1d70792a35c8a97414fe429f48311e41269c2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31576.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31576"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "media: hackrf: fix to not free memory after the device is registered in hackrf_probe()"
}