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cve416baaa9-dc9f-4396-8d5f-8c081fb06d67CVE-2021-47480
HistoryMay 22, 2024 - 9:15 a.m.

CVE-2021-47480

2024-05-2209:15:09
416baaa9-dc9f-4396-8d5f-8c081fb06d67
web.nvd.nist.gov
32
linux kernel
vulnerability
scsi
device driver
kernel panic
nvd
page fault

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.0%

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

scsi: core: Put LLD module refcnt after SCSI device is released

SCSI host release is triggered when SCSI device is freed. We have to make
sure that the low-level device driver module won’t be unloaded before SCSI
host instance is released because shost->hostt is required in the release
handler.

Make sure to put LLD module refcnt after SCSI device is released.

Fixes a kernel panic of ‘BUG: unable to handle page fault for address’
reported by Changhui and Yi.

Affected configurations

Vulners
Node
linuxlinux_kernelRange4.4.04.4.292
OR
linuxlinux_kernelRange4.5.04.9.290
OR
linuxlinux_kernelRange4.10.04.14.255
OR
linuxlinux_kernelRange4.15.04.19.216
OR
linuxlinux_kernelRange4.20.05.4.158
OR
linuxlinux_kernelRange5.5.05.10.78
OR
linuxlinux_kernelRange5.11.05.14.17
OR
linuxlinux_kernelRange5.15.0

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/scsi/scsi.c",
      "drivers/scsi/scsi_sysfs.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "1105573d964f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "8e4814a46178",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "61a0faa89f21",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "c2df161f69fb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "1ce287eff9f2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "7b57c38d12ae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "f30822c0b4c3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "f2b85040acec",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/scsi/scsi.c",
      "drivers/scsi/scsi_sysfs.c"
    ],
    "versions": [
      {
        "version": "4.4.292",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.290",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.255",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.216",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.158",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.78",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.14.17",
        "lessThanOrEqual": "5.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.0%