CVE-2021-46950 md/raid1: properly indicate failure when ending a failed write request

2024-02-2718:40:34

Linux

www.cve.org

linux kernel

vulnerability resolved

data corruption

raid1 arrays

bitmaps

data integrity.

7.9 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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

md/raid1: properly indicate failure when ending a failed write request

This patch addresses a data corruption bug in raid1 arrays using bitmaps.
Without this fix, the bitmap bits for the failed I/O end up being cleared.

Since we are in the failure leg of raid1_end_write_request, the request
either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/md/raid1.c"
    ],
    "versions": [
      {
        "version": "900c531899f5",
        "lessThan": "12216d0919b6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1cd972e0a107",
        "lessThan": "a6e17cab00fc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eeba6809d8d5",
        "lessThan": "6920cef604fa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eeba6809d8d5",
        "lessThan": "661061a45e32",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eeba6809d8d5",
        "lessThan": "59452e551784",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eeba6809d8d5",
        "lessThan": "538244fba59f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eeba6809d8d5",
        "lessThan": "2417b9869b81",
        "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/md/raid1.c"
    ],
    "versions": [
      {
        "version": "5.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.4",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.233",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.191",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.118",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.36",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.11.20",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.3",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]