{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-49940",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49940",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-06-18T10:54:40.745Z",
    "updatedAt": "2026-05-23T15:23:19.793Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "tty: n_gsm: add sanity check for gsm->receive in gsm_receive_buf()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: add sanity check for gsm->receive in gsm_receive_buf()\n\nA null pointer dereference can happen when attempting to access the\n\"gsm->receive()\" function in gsmld_receive_buf(). Currently, the code\nassumes that gsm->recieve is only called after MUX activation.\nSince the gsmld_receive_buf() function can be accessed without the need to\ninitialize the MUX, the gsm->receive() function will not be set and a\nNULL pointer dereference will occur.\n\nFix this by avoiding the call to \"gsm->receive()\" in case the function is\nnot initialized by adding a sanity check.\n\nCall Trace:\n <TASK>\n gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861\n tiocsti drivers/tty/tty_io.c:2293 [inline]\n tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:870 [inline]\n __se_sys_ioctl fs/ioctl.c:856 [inline]\n __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b8faa754b523a845facdc83120b2ecd290d7fa6d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5a82cf64f8ad63caf6bf115642ce44ddbc64311e"
            },
            {
              "version": "dfa9b6d34aac2154b5e926d7a7a061123bf137c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "309aea4b6b813f6678c3a547cfd7fe3a76ffa976"
            },
            {
              "version": "5e59c010c6862da329db17acca086afd8bea1aa8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5aa37f9510345a812c0998bcbbc4d88d1dcc4d8b"
            },
            {
              "version": "01aecd917114577c423f07cec0d186ad007d76fc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f16c6d2e58a4c2b972efcf9eb12390ee0ba3befb"
            },
            {
              "version": "2dc1be365a70699f7dda92fd9e48b84546086070",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.18.18",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.19"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.15.61",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.66"
            },
            {
              "version": "5.19.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.19.8"
            }
          ]
        }
      ]
    }
  }
}