PT-2026-4477 · Linux · Linux Kernel

Published 2025-01-01 · Updated 2026-05-26 · CVE-2025-71161

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains an issue within the dm-verity component related to recursive forward error correction. The recursive correction mechanism can lead to a denial-of-service condition. The fec read bufs function includes a loop with up to 253 iterations, potentially calling the verity hash for block function recursively up to four levels deep, resulting in a maximum of 4 billion iterations. This can cause the udev-worker process to become unresponsive. Additionally, the recursive correction does not function as intended due to data overwriting within shared buffers (fio->bufs) during recursive calls to verity hash for block.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-193

Related Identifiers

AZL-75129

AZL-78437

CVE-2025-71161

ECHO-DF7A-D988-B760

OPENSUSE-SU-2026:20416-1

SUSE-SU-2026:20838-1

SUSE-SU-2026:20931-1

SUSE-SU-2026:21284-1

Affected Products

Linux Kernel

References · 407

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71161.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-71161 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20838-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2025-71161 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2025-71161 · Vendor Advisory
• https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2026:20416-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2025-71161 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-71161 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71161 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2025-71161 · Vendor Advisory
• https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2025-71161 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-71161 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-71161 · Vendor Advisory