{
  "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-2022-48983",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-48983",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2024-10-21T20:06:00.376Z",
    "updatedAt": "2026-05-11T18:50:56.049Z",
    "importedAt": "2026-10-24T01:56:45.230Z",
    "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": "io_uring: Fix a null-ptr-deref in io_tctx_exit_cb()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: Fix a null-ptr-deref in io_tctx_exit_cb()\n\nSyzkaller reports a NULL deref bug as follows:\n\n BUG: KASAN: null-ptr-deref in io_tctx_exit_cb+0x53/0xd3\n Read of size 4 at addr 0000000000000138 by task file1/1955\n\n CPU: 1 PID: 1955 Comm: file1 Not tainted 6.1.0-rc7-00103-gef4d3ea40565 #75\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014\n Call Trace:\n  <TASK>\n  dump_stack_lvl+0xcd/0x134\n  ? io_tctx_exit_cb+0x53/0xd3\n  kasan_report+0xbb/0x1f0\n  ? io_tctx_exit_cb+0x53/0xd3\n  kasan_check_range+0x140/0x190\n  io_tctx_exit_cb+0x53/0xd3\n  task_work_run+0x164/0x250\n  ? task_work_cancel+0x30/0x30\n  get_signal+0x1c3/0x2440\n  ? lock_downgrade+0x6e0/0x6e0\n  ? lock_downgrade+0x6e0/0x6e0\n  ? exit_signals+0x8b0/0x8b0\n  ? do_raw_read_unlock+0x3b/0x70\n  ? do_raw_spin_unlock+0x50/0x230\n  arch_do_signal_or_restart+0x82/0x2470\n  ? kmem_cache_free+0x260/0x4b0\n  ? putname+0xfe/0x140\n  ? get_sigframe_size+0x10/0x10\n  ? do_execveat_common.isra.0+0x226/0x710\n  ? lockdep_hardirqs_on+0x79/0x100\n  ? putname+0xfe/0x140\n  ? do_execveat_common.isra.0+0x238/0x710\n  exit_to_user_mode_prepare+0x15f/0x250\n  syscall_exit_to_user_mode+0x19/0x50\n  do_syscall_64+0x42/0xb0\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n RIP: 0023:0x0\n Code: Unable to access opcode bytes at 0xffffffffffffffd6.\n RSP: 002b:00000000fffb7790 EFLAGS: 00000200 ORIG_RAX: 000000000000000b\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000\n R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n  </TASK>\n Kernel panic - not syncing: panic_on_warn set ...\n\nThis happens because the adding of task_work from io_ring_exit_work()\nisn't synchronized with canceling all work items from eg exec. The\nexecution of the two are ordered in that they are both run by the task\nitself, but if io_tctx_exit_cb() is queued while we're canceling all\nwork items off exec AND gets executed when the task exits to userspace\nrather than in the main loop in io_uring_cancel_generic(), then we can\nfind current->io_uring == NULL and hit the above crash.\n\nIt's safe to add this NULL check here, because the execution of the two\npaths are done by the task itself.\n\n[axboe: add code comment and also put an explanation in the commit msg]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d56d938b4bef3e1421a42023cdcd6e13c1f50831",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f895511de9d27fff71dad2c234ad53b4afd2b06c"
            },
            {
              "version": "d56d938b4bef3e1421a42023cdcd6e13c1f50831",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d91edca1943453aaaba4f380f6f364346222e5cf"
            },
            {
              "version": "d56d938b4bef3e1421a42023cdcd6e13c1f50831",
              "status": "affected",
              "versionType": "git",
              "lessThan": "998b30c3948e4d0b1097e639918c5cff332acac5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "5.15.83",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}