7.8

CVE-2025-22124: md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb

Modified
AliasesUBUNTU-CVE-2025-22124DEBIAN-CVE-2025-22124
Published 16-04-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-22124 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.7% 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
0.20%
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 25 · Related 24
DSA-6008-1SUSE-SU-2025:01964-1SUSE-SU-2025:01965-1SUSE-SU-2025:02000-1SUSE-SU-2025:02254-1SUSE-SU-2025:02307-1

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb In clustermd, separate write-intent-bitmaps are used for each cluster node: 0 4k 8k 12k ------------------------------------------------------------------- | idle | md super | bm super [0] + bits | | bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] | | bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits | | bm bits [3, contd] | | | So in node 1, pg_index in __write_sb_page() could equal to bitmap->storage.file_pages. Then bitmap_limit will be calculated to 0. md_super_write() will be called with 0 size. That means the first 4k sb area of node 1 will never be updated through filemap_write_page(). This bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize. Here use (pg_index % bitmap->storage.file_pages) to make calculation of bitmap_limit correct.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% 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.

Ubuntu112 products
  • linux< 6.8.0-106.106
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1050.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 655cc01889fa9b65441922565cddee64af49e6d6, < 5eaf57fdfa37c869e61e9908e03edd707f9145b8 | ≥ ab99a87542f194f28e2364a42afbf9fb48b1c724, < 60196f92bbc7901eb5cfa5d456651b87ea50a4a3 | ≥ ab99a87542f194f28e2364a42afbf9fb48b1c724, < bc3a9788961631359527763d7e1fcf26554c7cb1 | ≥ ab99a87542f194f28e2364a42afbf9fb48b1c724, < 6130825f34d41718c98a9b1504a79a23e379701e | 5600d6013c634c2b6b6c6c55c8ecb50c3a6211f2 | ≥ 6.6.44, < 6.6.157 | ≥ 6.10.3, < 6.11 | 6.11
  • linux_kernel≥ 6.6.44, < 6.7 | ≥ 6.10.3, < 6.12.46 | ≥ 6.13, < 6.14.2
Debian1 product
  • linux< 6.12.48-1 | < 6.16.3-1

3 vendors · 115 products

References

21 links
Show all 21 references