CVE-2025-71161

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 23 Jan 2026, 15:23
Last modified:14 Jul 2026, 12:44

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.17% LOW
0% probability +0.15%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Jan 2026, 15:23
Published
Vulnerability first disclosed
14 Jul 2026, 12:44
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: dm-verity: disable recursive forward error correction There are two problems with the recursive correction: 1. It may cause denial-of-service. In fec_read_bufs, there is a loop that has 253 iterations. For each iteration, we may call verity_hash_for_block recursively. There is a limit of 4 nested recursions - that means that there may be at most 253^4 (4 billion) iterations. Red Hat QE team actually created an image that pushes dm-verity to this limit - and this image just makes the udev-worker process get stuck in the 'D' state. 2. It doesn't work. In fec_read_bufs we store data into the variable "fio->bufs", but fio bufs is shared between recursive invocations, if "verity_hash_for_block" invoked correction recursively, it would overwrite partially filled fio->bufs.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.17%• Percentile: 6%

Techniques & Countermeasures

  • CWE-193•Off-by-one Error

    A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

Affected Systems

  • linux•linux

    ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 8b821ca892cfeeaf0bedc9fc72717294f67144d5 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < e227d2b229c7529bd98d348efc55262ccf24ab35 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 897d9006e75f46f8bd7df78faa424327ae6a4bcf | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 4220cb37406915c926c0e4a3dbab77cd9cceeb1e | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 232948cf600fba69aff36b25d85ef91a73a35756 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 | 4.5

  • linux•linux kernel

    ≥ 4.5, < 6.18.6

References (8)