CVE-2025-71161: dm-verity: disable recursive forward error correction
Vulnerability summary
CVE-2025-71161 is a high (CVSS 7.5) Off-by-one Error vulnerability in linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.5% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 37 · Related 38Timeline
- 23-01-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability 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
5 scores · 5 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/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:HDiffers
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/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:HDiffers
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
Increase +0.09 pp
From 0.38% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu157 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Chainguard5 products
- linux-aws-6.12< 6.12.77-r1 | < 6.12.74-r1 | < 6.12.78-r0 | < 6.12.76-r0 | < 6.12.80-r0 | < 6.12.77-r0 | < 6.12.77-r2
- linux-azure-6.12< 6.12.77-r2 | < 6.12.74-r1 | < 6.12.80-r0 | < 6.12.76-r0 | < 6.12.78-r0 | < 6.12.77-r1 | < 6.12.77-r0
- linux-gcp-6.12< 6.12.76-r0 | < 6.12.77-r0 | < 6.12.77-r1 | < 6.12.78-r0 | < 6.12.74-r1 | < 6.12.77-r2 | < 6.12.80-r0
- linux-qemu-6.12< 6.12.77-r0 | < 6.12.80-r0 | < 6.12.74-r1 | < 6.12.78-r0 | < 6.12.76-r0 | < 6.12.77-r1 | < 6.12.77-r2
- linux-vmware-6.12< 6.12.78-r0 | < 6.12.77-r1 | < 6.12.74-r1 | < 6.12.77-r2 | < 6.12.76-r0 | < 6.12.77-r0 | < 6.12.80-r0
Linux2 products
- linux≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 8b821ca892cfeeaf0bedc9fc72717294f67144d5 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < e227d2b229c7529bd98d348efc55262ccf24ab35 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 897d9006e75f46f8bd7df78faa424327ae6a4bcf | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 4220cb37406915c926c0e4a3dbab77cd9cceeb1e | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < 232948cf600fba69aff36b25d85ef91a73a35756 | ≥ a739ff3f543afbb4a041c16cd0182c8e8d366e70, < d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 | 4.5
- linux_kernel≥ 4.5, < 6.18.6
Debian1 product
- linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.8-1
4 vendors · 165 products
