{
  "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-2022-49070",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49070",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T01:54:36.360Z",
    "updatedAt": "2026-05-11T18:52:26.824Z",
    "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": "fbdev: Fix unregistering of framebuffers without device",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: Fix unregistering of framebuffers without device\n\nOF framebuffers do not have an underlying device in the Linux\ndevice hierarchy. Do a regular unregister call instead of hot\nunplugging such a non-existing device. Fixes a NULL dereference.\nAn example error message on ppc64le is shown below.\n\n  BUG: Kernel NULL pointer dereference on read at 0x00000060\n  Faulting instruction address: 0xc00000000080dfa4\n  Oops: Kernel access of bad area, sig: 11 [#1]\n  LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\n  [...]\n  CPU: 2 PID: 139 Comm: systemd-udevd Not tainted 5.17.0-ae085d7f9365 #1\n  NIP:  c00000000080dfa4 LR: c00000000080df9c CTR: c000000000797430\n  REGS: c000000004132fe0 TRAP: 0300   Not tainted  (5.17.0-ae085d7f9365)\n  MSR:  8000000002009033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 28228282  XER: 20000000\n  CFAR: c00000000000c80c DAR: 0000000000000060 DSISR: 40000000 IRQMASK: 0\n  GPR00: c00000000080df9c c000000004133280 c00000000169d200 0000000000000029\n  GPR04: 00000000ffffefff c000000004132f90 c000000004132f88 0000000000000000\n  GPR08: c0000000015658f8 c0000000015cd200 c0000000014f57d0 0000000048228283\n  GPR12: 0000000000000000 c00000003fffe300 0000000020000000 0000000000000000\n  GPR16: 0000000000000000 0000000113fc4a40 0000000000000005 0000000113fcfb80\n  GPR20: 000001000f7283b0 0000000000000000 c000000000e4a588 c000000000e4a5b0\n  GPR24: 0000000000000001 00000000000a0000 c008000000db0168 c0000000021f6ec0\n  GPR28: c0000000016d65a8 c000000004b36460 0000000000000000 c0000000016d64b0\n  NIP [c00000000080dfa4] do_remove_conflicting_framebuffers+0x184/0x1d0\n  [c000000004133280] [c00000000080df9c] do_remove_conflicting_framebuffers+0x17c/0x1d0 (unreliable)\n  [c000000004133350] [c00000000080e4d0] remove_conflicting_framebuffers+0x60/0x150\n  [c0000000041333a0] [c00000000080e6f4] remove_conflicting_pci_framebuffers+0x134/0x1b0\n  [c000000004133450] [c008000000e70438] drm_aperture_remove_conflicting_pci_framebuffers+0x90/0x100 [drm]\n  [c000000004133490] [c008000000da0ce4] bochs_pci_probe+0x6c/0xa64 [bochs]\n  [...]\n  [c000000004133db0] [c00000000002aaa0] system_call_exception+0x170/0x2d0\n  [c000000004133e10] [c00000000000c3cc] system_call_common+0xec/0x250\n\nThe bug [1] was introduced by commit 27599aacbaef (\"fbdev: Hot-unplug\nfirmware fb devices on forced removal\"). Most firmware framebuffers\nhave an underlying platform device, which can be hot-unplugged\nbefore loading the native graphics driver. OF framebuffers do not\n(yet) have that device. Fix the code by unregistering the framebuffer\nas before without a hot unplug.\n\nTested with 5.17 on qemu ppc64le emulation.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c894ac44786cfed383a6c6b20c1bfb12eb96018a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2388f826cdc9af2651991adc0feb79de9bdf2232"
            },
            {
              "version": "9565a3b5203a4d57acbc1d0e981c6df71864b4ab",
              "status": "affected",
              "versionType": "git",
              "lessThan": "de33df481545974ba47c46f05194e769e4307843"
            },
            {
              "version": "4d695d7c276f15adb1d2b64c584c3cf8f4f9e9ce",
              "status": "affected",
              "versionType": "git",
              "lessThan": "feed87ff122b1640c221d4dd559442ab2cd50bb1"
            },
            {
              "version": "27599aacbaefcbf2af7b06b0029459bbf682000d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f525289ff0ddeb380813bd81e0f9bdaaa1c9078"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.15.33",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.34"
            },
            {
              "version": "5.16.19",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.16.20"
            },
            {
              "version": "5.17.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.17.3"
            }
          ]
        }
      ]
    }
  }
}