7.8

CVE-2025-21712: linux

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2025-21712DEBIAN-CVE-2025-21712
Published 27-02-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-21712 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 22
DLA-4193-1DSA-5900-1USN-7521-1USN-7521-3USN-7703-1USN-7703-2

Timeline

  1. 27-02-2025
    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: Synchronize bitmap_get_stats() with bitmap lifetime After commit ec6bb299c7c3 ("md/md-bitmap: add 'sync_size' into struct md_bitmap_stats"), following panic is reported: Oops: general protection fault, probably for non-canonical address RIP: 0010:bitmap_get_stats+0x2b/0xa0 Call Trace: <TASK> md_seq_show+0x2d2/0x5b0 seq_read_iter+0x2b9/0x470 seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6c/0xf0 do_syscall_64+0x82/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Root cause is that bitmap_get_stats() can be called at anytime if mddev is still there, even if bitmap is destroyed, or not fully initialized. Deferenceing bitmap in this case can crash the kernel. Meanwhile, the above commit start to deferencing bitmap->storage, make the problem easier to trigger. Fix the problem by protecting bitmap_get_stats() with bitmap_info.mutex.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu138 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-78.78
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1035.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < eb2f9d98cd3e94a79fbf8fb90637c5b12e805428 | ≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < 032fa54f486eac5507976e7e31f079a767bc13a8 | ≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < 52848a095b55a302af92f52ca0de5b3112059bb8 | ≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < 237e19519c8ff6949f0ef57c4a0243f5b2b0fa18 | ≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < 4e9316eee3885bfb311b4759513f2ccf37891c09 | ≥ 32a7627cf3a35396a8e834faf34e38ae9f3b1309, < 8d28d0ddb986f56920ac97ae704cc3340a699a30 | 2.6.13
  • linux_kernel≥ 2.6.13, < 6.1.130 | ≥ 6.2, < 6.6.80 | ≥ 6.7, < 6.12.13 | ≥ 6.13, < 6.13.2
Debian1 product
  • linux< 6.1.133-1 | < 6.12.13-1

3 vendors · 141 products

References

34 links
Show all 34 references