Integer overflow in Linux kernel - CVE-2026-89826

Vulnerability identifier: #VU150455

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89826

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive information or cause a denial of service.

The vulnerability exists due to integer overflow and improper bounds checking in panthor_fw_read_build_info() when processing firmware build metadata. A local user can supply a firmware image containing crafted metadata values to disclose sensitive information or cause a denial of service.

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/5516f1acfd07564361cf306cc90a8e513df0f096
• https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8
• https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170

• Integer overflow in Linux kernel drm panthor driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more