CVE-2025-21667: linux Infinite Loop
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21667DEBIAN-CVE-2025-21667
Published 31-01-2025Last modified 23-05-2026
Vulnerability summary
CVE-2025-21667 is a medium (CVSS 5.5) Infinite Loop vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.4% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 20 · Related 18Timeline
- 31-01-2025PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: iomap: avoid avoid truncating 64-bit offset to 32 bits on 32-bit kernels, iomap_write_delalloc_scan() was inadvertently using a 32-bit position due to folio_next_index() returning an unsigned long. This could lead to an infinite loop when writing to an xfs filesystem.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.7Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesSingle source
Medium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
0.00 pp
From 0.22% on 19-09-2026
19-09-202619-10-2026
EPSS score0.22%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu106 products
- linux< 6.8.0-62.65
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1030.32
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 38be53c3fd7f4f4bd5de319a323d72f9f6beb16d, < 7ca4bd6b754913910151acce00be093f03642725 | ≥ f43dc4dc3eff028b5ddddd99f3a66c5a6bdd4e78, < 91371922704c8d82049ef7c2ad974d0a2cd1174d | ≥ f43dc4dc3eff028b5ddddd99f3a66c5a6bdd4e78, < 402ce16421477e27f30b57d6d1a6dc248fa3a4e4 | ≥ f43dc4dc3eff028b5ddddd99f3a66c5a6bdd4e78, < c13094b894de289514d84b8db56d1f2931a0bade | ≥ 6.1.92, < 6.1.127 | 6.2
- linux_kernel< 6.1.127 | ≥ 6.2, < 6.6.74 | ≥ 6.7, < 6.12.11 | 6.13:rc1 | 6.13:rc2 | 6.13:rc3 | 6.13:rc4 | 6.13:rc5 | 6.13:rc6
Debian1 product
- linux< 6.1.128-1 | < 6.12.11-1
3 vendors · 109 products
