Improper handling of exceptional conditions in Linux kernel - CVE-2026-90262

Vulnerability identifier: #VU151224

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90262

CWE-ID: CWE-755

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of read errors in btrfs_read_merkle_tree_page() when reading Merkle tree pages after a transient read failure. A local user can trigger subsequent reads of Merkle tree data 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/12b6d1a1715cbced2e445ca353f9c9987b8636e2
• https://git.kernel.org/stable/c/81241f734f0f662378f5ffc53882b012923e6fe5
• https://git.kernel.org/stable/c/8cc569696dac51fc62bb39b3b8f530582b916d29
• https://git.kernel.org/stable/c/90e9eae1b5907fa36620ffb7f4f1a4afa9333427
• https://git.kernel.org/stable/c/c1fa005cdf3b7ff14cdfd7d512830088a3fc256b

• Improper handling of exceptional conditions in Linux kernel btrfs
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more