CVE-2021-46950

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

High · published February 27, 2024

CVSS v3.1
7.8
EPSS
0%
Percentile
15.2
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00248 · 15.2th percentile
Published
2024-02-27T18:40Z
EPSS history
Timeline
  • 27 FEB 18:40Z
    md/raid1: properly indicate failure when ending a failed write request
    cvelistv5