Use-after-free in Linux kernel - CVE-2025-68784

Vulnerability identifier: #VU121383

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-2025-68784

CWE-ID: CWE-416

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 a use-after-free error within the xrep_xattr_salvage_remote_attr() function in fs/xfs/scrub/attr_repair.c. A local user can escalate privileges on the system.

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

Install update from vendor's repository.

linux (Debian package) - update to 6.12.69-1
linux (Ubuntu package) - addressed in versions 6.17.0-22.22, 6.17.0-1010.11
linux-aws (Ubuntu package) - addressed in versions 6.17.0-22.22~24.04.1, 6.17.0-1011.11, 6.17.0-1011.11~24.04.1, 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1010.11~24.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-azure (Ubuntu package) - addressed in versions 6.17.0-1013.13, 6.17.0-1013.13~24.04.1, 6.17.0-1020.20
linux-raspi (Ubuntu package) - update to 6.17.0-1014.14

• https://git.kernel.org/stable/c/1e2d3aa19c7962b9474b22893160cb460494c45f
• https://git.kernel.org/stable/c/5990fd756943836978ad184aac980e2b36ab7e01
• https://git.kernel.org/stable/c/d29ed9ff972afe17c215cab171761d7a15d7063f

• Use-after-free in Linux kernel xfs scrub
• Debian update for linux
• Ubuntu update for linux
• Ubuntu update for linux-realtime-6.17
• Ubuntu update for linux-gcp
• Ubuntu update for linux-aws
• Ubuntu update for linux-azure
• Ubuntu update for linux-raspi