Infinite loop in Linux kernel - CVE-2026-93097

Vulnerability identifier: #VU150920

CSH Severity: Low

CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93097

CWE-ID: CWE-835

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to an infinite loop in the CXL poison list processing function when processing a device response containing an empty poison payload with the CXL_POISON_FLAG_MORE flag set. An attacker with physical access can cause a CXL device to return a crafted poison response to cause a denial of service.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69
• https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362
• https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa
• https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad
• https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6

• Infinite loop in Linux kernel cxl core driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more