Buffer overflow in Linux kernel - CVE-2025-68726

Vulnerability identifier: #VU120556

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-2025-68726

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to memory corruption within the crypto_aead_init_tfm() function in crypto/aead.c. A local user can escalate privileges on the system.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-azure (Ubuntu package)
linux-raspi (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

Install update from vendor's repository.

linux (Ubuntu package) - addressed in versions 6.17.0-19.19, 6.17.0-19.19~24.04.2, 6.17.0-1009.9, 6.17.0-1009.9~24.04.1, 6.17.0-1009.9~24.04.2
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1008.9, 6.17.0-1009.9~24.04.3
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1008.9~24.04.1
linux-azure (Ubuntu package) - addressed in versions 6.17.0-1010.10, 6.17.0-1010.10~24.04.1
linux-raspi (Ubuntu package) - update to 6.17.0-1010.10
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1017.17

• https://git.kernel.org/stable/c/12b413f5460c393d1151a37f591140693eca0f84
• https://git.kernel.org/stable/c/64377e66e187164bd6737112d07257f5f0feb681
• https://git.kernel.org/stable/c/9b04d8f00569573796dd05397f5779135593eb24

• Buffer overflow in Linux kernel crypto
• Ubuntu update for linux
• Ubuntu update for linux-gcp-6.17
• Ubuntu update for linux-realtime-6.17
• Ubuntu update for linux-azure
• Ubuntu update for linux-raspi
• Ubuntu update for linux-oem-6.17