CVE-2022-50295 (GCVE-0-2022-50295)
Vulnerability from cvelistv5
Published
2025-09-15 14:45
Modified
2025-09-15 14:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd() Syzkaller produced the below call trace: BUG: KASAN: null-ptr-deref in io_msg_ring+0x3cb/0x9f0 Write of size 8 at addr 0000000000000070 by task repro/16399 CPU: 0 PID: 16399 Comm: repro Not tainted 6.1.0-rc1 #28 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 ? io_msg_ring+0x3cb/0x9f0 kasan_report+0xbc/0xf0 ? io_msg_ring+0x3cb/0x9f0 kasan_check_range+0x140/0x190 io_msg_ring+0x3cb/0x9f0 ? io_msg_ring_prep+0x300/0x300 io_issue_sqe+0x698/0xca0 io_submit_sqes+0x92f/0x1c30 __do_sys_io_uring_enter+0xae4/0x24b0 .... RIP: 0033:0x7f2eaf8f8289 RSP: 002b:00007fff40939718 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2eaf8f8289 RDX: 0000000000000000 RSI: 0000000000006f71 RDI: 0000000000000004 RBP: 00007fff409397a0 R08: 0000000000000000 R09: 0000000000000039 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004006d0 R13: 00007fff40939880 R14: 0000000000000000 R15: 0000000000000000 </TASK> Kernel panic - not syncing: panic_on_warn set ... We don't have a NULL check on file_ptr in io_msg_send_fd() function, so when file_ptr is NUL src_file is also NULL and get_file() dereferences a NULL pointer and leads to above crash. Add a NULL check to fix this issue.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0163e04ea64cc3dfaa12390286e5f2f481c3b2e3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16bbdfe5fb0e78e0acb13e45fc127e9a296913f2
Impacted products
Vendor Product Version
Linux Linux Version: e6130eba8a848a7a6ba6c534bd8f6d60749ae1a9
Version: e6130eba8a848a7a6ba6c534bd8f6d60749ae1a9
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   Linux Linux Version: 6.0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/msg_ring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.6",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()\n\nSyzkaller produced the below call trace:\n\n BUG: KASAN: null-ptr-deref in io_msg_ring+0x3cb/0x9f0\n Write of size 8 at addr 0000000000000070 by task repro/16399\n\n CPU: 0 PID: 16399 Comm: repro Not tainted 6.1.0-rc1 #28\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0xcd/0x134\n  ? io_msg_ring+0x3cb/0x9f0\n  kasan_report+0xbc/0xf0\n  ? io_msg_ring+0x3cb/0x9f0\n  kasan_check_range+0x140/0x190\n  io_msg_ring+0x3cb/0x9f0\n  ? io_msg_ring_prep+0x300/0x300\n  io_issue_sqe+0x698/0xca0\n  io_submit_sqes+0x92f/0x1c30\n  __do_sys_io_uring_enter+0xae4/0x24b0\n....\n RIP: 0033:0x7f2eaf8f8289\n RSP: 002b:00007fff40939718 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa\n RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2eaf8f8289\n RDX: 0000000000000000 RSI: 0000000000006f71 RDI: 0000000000000004\n RBP: 00007fff409397a0 R08: 0000000000000000 R09: 0000000000000039\n R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004006d0\n R13: 00007fff40939880 R14: 0000000000000000 R15: 0000000000000000\n  \u003c/TASK\u003e\n Kernel panic - not syncing: panic_on_warn set ...\n\nWe don\u0027t have a NULL check on file_ptr in io_msg_send_fd() function,\nso when file_ptr is NUL src_file is also NULL and get_file()\ndereferences a NULL pointer and leads to above crash.\n\nAdd a NULL check to fix this issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:45:51.241Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0163e04ea64cc3dfaa12390286e5f2f481c3b2e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/16bbdfe5fb0e78e0acb13e45fc127e9a296913f2"
        }
      ],
      "title": "io_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50295",
    "datePublished": "2025-09-15T14:45:51.241Z",
    "dateReserved": "2025-09-15T14:18:36.811Z",
    "dateUpdated": "2025-09-15T14:45:51.241Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50295\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:40.880\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nio_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()\\n\\nSyzkaller produced the below call trace:\\n\\n BUG: KASAN: null-ptr-deref in io_msg_ring+0x3cb/0x9f0\\n Write of size 8 at addr 0000000000000070 by task repro/16399\\n\\n CPU: 0 PID: 16399 Comm: repro Not tainted 6.1.0-rc1 #28\\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0xcd/0x134\\n  ? io_msg_ring+0x3cb/0x9f0\\n  kasan_report+0xbc/0xf0\\n  ? io_msg_ring+0x3cb/0x9f0\\n  kasan_check_range+0x140/0x190\\n  io_msg_ring+0x3cb/0x9f0\\n  ? io_msg_ring_prep+0x300/0x300\\n  io_issue_sqe+0x698/0xca0\\n  io_submit_sqes+0x92f/0x1c30\\n  __do_sys_io_uring_enter+0xae4/0x24b0\\n....\\n RIP: 0033:0x7f2eaf8f8289\\n RSP: 002b:00007fff40939718 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa\\n RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2eaf8f8289\\n RDX: 0000000000000000 RSI: 0000000000006f71 RDI: 0000000000000004\\n RBP: 00007fff409397a0 R08: 0000000000000000 R09: 0000000000000039\\n R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004006d0\\n R13: 00007fff40939880 R14: 0000000000000000 R15: 0000000000000000\\n  \u003c/TASK\u003e\\n Kernel panic - not syncing: panic_on_warn set ...\\n\\nWe don\u0027t have a NULL check on file_ptr in io_msg_send_fd() function,\\nso when file_ptr is NUL src_file is also NULL and get_file()\\ndereferences a NULL pointer and leads to above crash.\\n\\nAdd a NULL check to fix this issue.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0163e04ea64cc3dfaa12390286e5f2f481c3b2e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/16bbdfe5fb0e78e0acb13e45fc127e9a296913f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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