{
  "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-2023-54239",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54239",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-30T12:11:28.378Z",
    "updatedAt": "2026-05-11T19:58:08.672Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "iommufd: Check for uptr overflow",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Check for uptr overflow\n\nsyzkaller found that setting up a map with a user VA that wraps past zero\ncan trigger WARN_ONs, particularly from pin_user_pages weirdly returning 0\ndue to invalid arguments.\n\nPrevent creating a pages with a uptr and size that would math overflow.\n\n  WARNING: CPU: 0 PID: 518 at drivers/iommu/iommufd/pages.c:793 pfn_reader_user_pin+0x2e6/0x390\n  Modules linked in:\n  CPU: 0 PID: 518 Comm: repro Not tainted 6.3.0-rc2-eeac8ede1755+ #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n  RIP: 0010:pfn_reader_user_pin+0x2e6/0x390\n  Code: b1 11 e9 25 fe ff ff e8 28 e4 0f ff 31 ff 48 89 de e8 2e e6 0f ff 48 85 db 74 0a e8 14 e4 0f ff e9 4d ff ff ff e8 0a e4 0f ff <0f> 0b bb f2 ff ff ff e9 3c ff ff ff e8 f9 e3 0f ff ba 01 00 00 00\n  RSP: 0018:ffffc90000f9fa30 EFLAGS: 00010246\n  RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff821e2b72\n  RDX: 0000000000000000 RSI: ffff888014184680 RDI: 0000000000000002\n  RBP: ffffc90000f9fa78 R08: 00000000000000ff R09: 0000000079de6f4e\n  R10: ffffc90000f9f790 R11: ffff888014185418 R12: ffffc90000f9fc60\n  R13: 0000000000000002 R14: ffff888007879800 R15: 0000000000000000\n  FS:  00007f4227555740(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000020000043 CR3: 000000000e748005 CR4: 0000000000770ef0\n  PKRU: 55555554\n  Call Trace:\n   <TASK>\n   pfn_reader_next+0x14a/0x7b0\n   ? interval_tree_double_span_iter_update+0x11a/0x140\n   pfn_reader_first+0x140/0x1b0\n   iopt_pages_rw_slow+0x71/0x280\n   ? __this_cpu_preempt_check+0x20/0x30\n   iopt_pages_rw_access+0x2b2/0x5b0\n   iommufd_access_rw+0x19f/0x2f0\n   iommufd_test+0xd11/0x16f0\n   ? write_comp_data+0x2f/0x90\n   iommufd_fops_ioctl+0x206/0x330\n   __x64_sys_ioctl+0x10e/0x160\n   ? __pfx_iommufd_fops_ioctl+0x10/0x10\n   do_syscall_64+0x3b/0x90\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8d160cd4d5066f864ec0f2c981470e55ac03ac27",
              "status": "affected",
              "versionType": "git",
              "lessThan": "800963e7eb001ada8cf2418f159fb649694467f1"
            },
            {
              "version": "8d160cd4d5066f864ec0f2c981470e55ac03ac27",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e4395701330fc4aee530905039516fe770b81417"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.2"
            },
            {
              "version": "6.2.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "version": "6.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}