CVE-2025-71161
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | 6.18.6 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.85-1 |
| sid | Fixed | 6.18.8-1 |
| forky | Fixed | 6.18.8-1 |
| bullseye | Fixed | 6.1.170-1~deb11u1 |
| bookworm | Fixed | 6.1.170-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://www.suse.com/security/cve/CVE-2025-71161.html
- https://security-tracker.debian.org/tracker/CVE-2025-71161
- https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756
- https://git.kernel.org/stable/c/4220cb37406915c926c0e4a3dbab77cd9cceeb1e
- https://git.kernel.org/stable/c/897d9006e75f46f8bd7df78faa424327ae6a4bcf
- https://git.kernel.org/stable/c/8b821ca892cfeeaf0bedc9fc72717294f67144d5
- https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801
- https://git.kernel.org/stable/c/e227d2b229c7529bd98d348efc55262ccf24ab35
CWEs
CWE-193
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.