Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — dm-verity: disable recursive forward error correction
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0034 27.2 —
AFFECTED
Product Versions Fixed
Linux a739ff3f543afbb4a041c16cd0182c8e8d366e70 – —
Linux 4.5 – 5.15.209
TIMELINE
Jan 13 Reserved by Linux
Jan 23 Published (CNA: Linux)
Jul 30 RESCORED — CVE-2025-71161 (Linux). CVSS 7.5 → 5.5 (NVD).
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| January 13, 2026 | Reserved | Reserved by Linux |
| January 23, 2026 | Published | Published (CNA: Linux) |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-71161 (Linux). CVSS 7.5 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | a739ff3f543afbb4a041c16cd0182c8e8d366e70 | — |
| Linux | Linux | — | 4.5 | 5.15.209 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-71161 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.