CVE-2025-71161dm-verity: disable recursive forward error correction
Updated under an hour ago ()
Does this affect you?
It affects Linux and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 8b821ca892cfeeaf0bedc9fc72717294f67144d5; from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before e227d2b229c7529bd98d348efc55262ccf24ab35; from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 897d9006e75f46f8bd7df78faa424327ae6a4bcf; from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 4220cb37406915c926c0e4a3dbab77cd9cceeb1e; from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 232948cf600fba69aff36b25d85ef91a73a35756; from a739ff3f543afbb4a041c16cd0182c8e8d366e70 before d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.5 before 6.18.6 | NVD |
References
- https://git.kernel.org/stable/c/8b821ca892cfeeaf0bedc9fc72717294f67144d5
- https://git.kernel.org/stable/c/e227d2b229c7529bd98d348efc55262ccf24ab35
- https://git.kernel.org/stable/c/897d9006e75f46f8bd7df78faa424327ae6a4bcf
- https://git.kernel.org/stable/c/4220cb37406915c926c0e4a3dbab77cd9cceeb1e
- https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756patch
- https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.