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.
References
Configurations
History
26 Feb 2026, 20:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-193 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756 - Patch | |
| References | () https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
23 Jan 2026, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-23 16:15
Updated : 2026-02-26 20:17
NVD link : CVE-2025-71161
Mitre link : CVE-2025-71161
CVE.ORG link : CVE-2025-71161
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-193
Off-by-one Error