PT-2026-26117 · Linux+1 · Linux Kernel+1

Jann Horn · Published 2026-01-01 · Updated 2026-05-22 · CVE-2026-23257

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 net/liquidio module related to memory management during device setup and cleanup. Specifically, a flaw exists in the setup nic devices() function where the cleanup loop incorrectly skips failing indices, leading to a memory leak. The issue arises because the loop iterates incorrectly after encountering a failure during device initialization. The problem was identified through code review and addressed by modifying the cleanup loop to iterate from the current index down to zero and by decrementing i in the devlink alloc failure path.

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

BDU:2026-03450

CVE-2026-23257

USN-8278-1

USN-8289-1

USN-8296-1

Affected Products

Linux Kernel

Ubuntu

References · 227

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23257.json · Exploit
• https://ubuntu.com/security/CVE-2026-23095 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23025 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23254 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23167 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23145 · Vendor Advisory
• https://git.kernel.org/stable/c/293eaad0d6d6b2a37a458c7deb7be345349cd963 · Patch
• https://ubuntu.com/security/CVE-2025-71198 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23131 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71196 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23020 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23257 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23059 · Vendor Advisory
• https://git.kernel.org/stable/c/8558aef4e8a1a83049ab906d21d391093cfa7e7f · Patch
• https://ubuntu.com/security/CVE-2026-23103 · Vendor Advisory