CVE-2023-53576

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

null_blk: Always check queue mode setting from configfs

Make sure to check device queue mode in the null_validate_conf() and return error for NULL_Q_RQ as we don't allow legacy I/O path, without this patch we get OOPs when queue mode is set to 1 from configfs, following are repro steps :-

modprobe null_blk nr_devices=0 mkdir config/nullb/nullb0 echo 1 > config/nullb/nullb0/memory_backed echo 4096 > config/nullb/nullb0/blocksize echo 20480 > config/nullb/nullb0/size echo 1 > config/nullb/nullb0/queue_mode echo 1 > config/nullb/nullb0/power

Detalles técnicos trazas, registros y código del informe original

Entering kdb (current=0xffff88810acdd080, pid 2372) on processor 42 Oops: (null)
due to oops @ 0xffffffffc041c329
CPU: 42 PID: 2372 Comm: sh Tainted: G           O     N 6.3.0-rc5lblk+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:null_add_dev.part.0+0xd9/0x720 [null_blk]
Code: 01 00 00 85 d2 0f 85 a1 03 00 00 48 83 bb 08 01 00 00 00 0f 85 f7 03 00 00 80 bb 62 01 00 00 00 48 8b 75 20 0f 85 6d 02 00 00 <48> 89 6e 60 48 8b 75 20 bf 06 00 00 00 e8 f5 37 2c c1 48 8b 75 20
RSP: 0018:ffffc900052cbde0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffff88811084d800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888100042e00
RBP: ffff8881053d8200 R08: ffffc900052cbd68 R09: ffff888105db2000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: ffff888104765200 R14: ffff88810eec1748 R15: ffff88810eec1740
FS:  00007fd445fd1740(0000) GS:ffff8897dfc80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000060 CR3: 0000000166a00000 CR4: 0000000000350ee0
DR0: ffffffff8437a488 DR1: ffffffff8437a489 DR2: ffffffff8437a48a
DR3: ffffffff8437a48b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nullb_device_power_store+0xd1/0x120 [null_blk]
 configfs_write_iter+0xb4/0x120
 vfs_write+0x2ba/0x3c0
 ksys_write+0x5f/0xe0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fd4460c57a7
Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007ffd3792a4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd4460c57a7
RDX: 0000000000000002 RSI: 000055b43c02e4c0 RDI: 0000000000000001
RBP: 000055b43c02e4c0 R08: 000000000000000a R09: 00007fd44615b4e0
R10: 00007fd44615b3e0 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fd446198520 R14: 0000000000000002 R15: 00007fd446198700
 </TASK>

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.14%
Percentil entre todas las CVEs puntuadas: 3
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-476

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-53576",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "e50b1e327aeb4b224364aa6f85c1713ff8b3654b",
              "lessThan": "e732a266b973cd4e115e2cc2ea5007119e8a7fbc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e50b1e327aeb4b224364aa6f85c1713ff8b3654b",
              "lessThan": "35e304dbcefa95237a3d6f94c007bfb10f012b17",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e50b1e327aeb4b224364aa6f85c1713ff8b3654b",
              "lessThan": "fd35b7bb6d5a329c427924886949ab51f210200a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e50b1e327aeb4b224364aa6f85c1713ff8b3654b",
              "lessThan": "651260e563d9f50827dac496dc8a0b9b23d5db1a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e50b1e327aeb4b224364aa6f85c1713ff8b3654b",
              "lessThan": "63f8793ee60513a09f110ea460a6ff2c33811cdb",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/block/null_blk/main.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.20",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.113",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.30",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/block/null_blk/main.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-04T16:15:53.250",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/35e304dbcefa95237a3d6f94c007bfb10f012b17",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/63f8793ee60513a09f110ea460a6ff2c33811cdb",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/651260e563d9f50827dac496dc8a0b9b23d5db1a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e732a266b973cd4e115e2cc2ea5007119e8a7fbc",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fd35b7bb6d5a329c427924886949ab51f210200a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: Always check queue mode setting from configfs\n\nMake sure to check device queue mode in the null_validate_conf() and\nreturn error for NULL_Q_RQ as we don't allow legacy I/O path, without\nthis patch we get OOPs when queue mode is set to 1 from configfs,\nfollowing are repro steps :-\n\nmodprobe null_blk nr_devices=0\nmkdir config/nullb/nullb0\necho 1 > config/nullb/nullb0/memory_backed\necho 4096 > config/nullb/nullb0/blocksize\necho 20480 > config/nullb/nullb0/size\necho 1 > config/nullb/nullb0/queue_mode\necho 1 > config/nullb/nullb0/power\n\nEntering kdb (current=0xffff88810acdd080, pid 2372) on processor 42 Oops: (null)\ndue to oops @ 0xffffffffc041c329\nCPU: 42 PID: 2372 Comm: sh Tainted: G           O     N 6.3.0-rc5lblk+ #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\nRIP: 0010:null_add_dev.part.0+0xd9/0x720 [null_blk]\nCode: 01 00 00 85 d2 0f 85 a1 03 00 00 48 83 bb 08 01 00 00 00 0f 85 f7 03 00 00 80 bb 62 01 00 00 00 48 8b 75 20 0f 85 6d 02 00 00 <48> 89 6e 60 48 8b 75 20 bf 06 00 00 00 e8 f5 37 2c c1 48 8b 75 20\nRSP: 0018:ffffc900052cbde0 EFLAGS: 00010246\nRAX: 0000000000000001 RBX: ffff88811084d800 RCX: 0000000000000001\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888100042e00\nRBP: ffff8881053d8200 R08: ffffc900052cbd68 R09: ffff888105db2000\nR10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002\nR13: ffff888104765200 R14: ffff88810eec1748 R15: ffff88810eec1740\nFS:  00007fd445fd1740(0000) GS:ffff8897dfc80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000060 CR3: 0000000166a00000 CR4: 0000000000350ee0\nDR0: ffffffff8437a488 DR1: ffffffff8437a489 DR2: ffffffff8437a48a\nDR3: ffffffff8437a48b DR6: 00000000ffff0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n nullb_device_power_store+0xd1/0x120 [null_blk]\n configfs_write_iter+0xb4/0x120\n vfs_write+0x2ba/0x3c0\n ksys_write+0x5f/0xe0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\nRIP: 0033:0x7fd4460c57a7\nCode: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24\nRSP: 002b:00007ffd3792a4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd4460c57a7\nRDX: 0000000000000002 RSI: 000055b43c02e4c0 RDI: 0000000000000001\nRBP: 000055b43c02e4c0 R08: 000000000000000a R09: 00007fd44615b4e0\nR10: 00007fd44615b3e0 R11: 0000000000000246 R12: 0000000000000002\nR13: 00007fd446198520 R14: 0000000000000002 R15: 00007fd446198700\n </TASK>"
    }
  ],
  "lastModified": "2026-06-17T06:45:38.347",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8177E76-3132-48DA-9A80-A8C120E1F22C",
              "versionEndExcluding": "5.10.181",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F3D5E1B5-AB9D-4ECC-8F11-F3E1BF761E27",
              "versionEndExcluding": "5.15.113",
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            },
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              "vulnerable": true,
              "matchCriteriaId": "E9430E62-03EA-42E6-9E5E-BD1D5124D107",
              "versionEndExcluding": "6.1.30",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "26C54BF0-3EED-46D4-92A7-5F07F658B49B",
              "versionEndExcluding": "6.3.4",
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            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}