7.8

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

Modified
AliasesUBUNTU-CVE-2021-46950DEBIAN-CVE-2021-46950
Published 27-02-2024Last modified 23-05-2026

Vulnerability summary

CVE-2021-46950 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1643-1SUSE-SU-2024:1646-1SUSE-SU-2024:1870-1

Timeline

  1. 27-02-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

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).

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu85 products
  • linux< 4.15.0-151.157 | < 5.4.0-77.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1109.116 | < 5.4.0-1051.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 900c531899f5ee2321bef79e20055787bc73251d, < 12216d0919b64ee2ea5dc7a50e455670f44383d5 | ≥ 1cd972e0a10760a1fa27d9830d78446c891c23b6, < a6e17cab00fc5bf85472434c52ac751426257c6f | ≥ eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad, < 6920cef604fa57f9409e3960413e9cc11f5c5a40 | ≥ eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad, < 661061a45e32d8b2cc0e306da9f169ad44011382 | ≥ eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad, < 59452e551784b7a57a45d971727e9db63b192515 | ≥ eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad, < 538244fba59fde17186322776247cd9c05be86dd | ≥ eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad, < 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd | a1f4fcb880988a96c0b2d5c3305ffc4e49eca0ed | 344242d50f468a250bf4b6136934392758412ed8 | ≥ 4.14.147, < 4.14.233 | ≥ 4.19.77, < 4.19.191 | ≥ 5.2.19, < 5.3 | ≥ 5.3.4, < 5.4 | 5.4
  • linux_kernel≥ 4.14.147, < 4.14.233 | ≥ 4.19.77, < 4.19.191 | ≥ 5.2.19, < 5.3 | ≥ 5.3.4, < 5.4.118 | ≥ 5.5, < 5.10.36 | ≥ 5.11, < 5.11.20 | ≥ 5.12, < 5.12.3
Debian1 product
  • linux< 5.10.38-1

3 vendors · 88 products

References

11 links
Show all 11 references