Incorrect Conversion between Numeric Types in Linux kernel - CVE-2026-89914

Vulnerability identifier: #VU150371

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89914

CWE-ID: CWE-681

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise confidentiality, integrity, and availability.

The vulnerability exists due to incorrect sign extension in the decode_range_tlbi() helper when processing range-based TLBI invalidation. A remote attacker can trigger range-based TLBI invalidation to compromise confidentiality, integrity, and availability.

Linux kernel
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)

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

• https://git.kernel.org/stable/c/2393470085649f0b973ecceb26fe8fc71edde0c1
• https://git.kernel.org/stable/c/3feb83918e30f0472e058224b926ebfe8a064fac
• https://git.kernel.org/stable/c/72bce82c4171bf330919ff1b64dc0a36c254ec7d

• Incorrect Conversion between Numeric Types in Linux kernel arm64 kvm
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more