NULL pointer dereference in Linux kernel - CVE-2025-21685

Vulnerability identifier: #VU103745

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21685

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the yt2_1380_fc_serdev_probe() function in drivers/platform/x86/lenovo-yoga-tab2-pro-1380-fastcharger.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-image-realtime (Ubuntu package)
linux-image-6.11.0-1008-realtime (Ubuntu package)
linux-image-6.11.0-24-generic (Ubuntu package)
linux-image-6.11.0-24-generic-64k (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1011-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.11.0-1012-aws (Ubuntu package)
linux-image-6.11.0-1012-lowlatency-64k (Ubuntu package)
linux-image-6.11.0-1012-lowlatency (Ubuntu package)
linux-image-lowlatency-hwe-24.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package)
linux-image-gcp-64k (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.11.0-1013-azure-fde (Ubuntu package)
linux-image-6.11.0-1013-azure (Ubuntu package)
linux-image-6.11.0-1013-gcp (Ubuntu package)
linux-image-6.11.0-1013-gcp-64k (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-6.11.0-1014-oracle (Ubuntu package)
linux-image-6.11.0-1014-oracle-64k (Ubuntu package)
linux-image-6.11.0-1020-oem (Ubuntu package)
linux-image-oem-24.04b (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 6.12.11, 6.13
linux-image-realtime (Ubuntu package) - update to Ubuntu Pro
linux-image-6.11.0-1008-realtime (Ubuntu package) - update to Ubuntu Pro
linux-image-6.11.0-24-generic (Ubuntu package) - addressed in versions 6.11.0-24.24, 6.11.0-24.24~24.04.1
linux-image-6.11.0-24-generic-64k (Ubuntu package) - addressed in versions 6.11.0-24.24, 6.11.0-24.24~24.04.1
linux-image-virtual (Ubuntu package) - update to 6.11.0-24.24+1
linux-image-generic-64k (Ubuntu package) - update to 6.11.0-24.24+1
linux-image-generic (Ubuntu package) - update to 6.11.0-24.24+1
linux-image-virtual-hwe-24.04 (Ubuntu package) - update to 6.11.0-24.24~24.04.1
linux-image-generic-hwe-24.04 (Ubuntu package) - update to 6.11.0-24.24~24.04.1
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - update to 6.11.0-24.24~24.04.1
linux-image-6.11.0-1011-raspi (Ubuntu package) - update to 6.11.0-1011.11
linux-image-raspi (Ubuntu package) - update to 6.11.0-1011.11
linux-image-lowlatency-64k (Ubuntu package) - update to 6.11.0-1012.13
linux-image-lowlatency (Ubuntu package) - update to 6.11.0-1012.13
linux-image-aws (Ubuntu package) - update to 6.11.0-1012.13
linux-image-6.11.0-1012-aws (Ubuntu package) - update to 6.11.0-1012.13
linux-image-6.11.0-1012-lowlatency-64k (Ubuntu package) - addressed in versions 6.11.0-1012.13, 6.11.0-1012.13~24.04.1
linux-image-6.11.0-1012-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1012.13, 6.11.0-1012.13~24.04.1
linux-image-lowlatency-hwe-24.04 (Ubuntu package) - update to 6.11.0-1012.13~24.04.1
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package) - update to 6.11.0-1012.13~24.04.1
linux-image-gcp-64k (Ubuntu package) - update to 6.11.0-1013.13
linux-image-azure-fde (Ubuntu package) - addressed in versions 6.11.0-1013.13, 6.11.0-1013.13~24.04.1
linux-image-azure (Ubuntu package) - addressed in versions 6.11.0-1013.13, 6.11.0-1013.13~24.04.1
linux-image-6.11.0-1013-azure-fde (Ubuntu package) - addressed in versions 6.11.0-1013.13, 6.11.0-1013.13~24.04.1
linux-image-6.11.0-1013-azure (Ubuntu package) - addressed in versions 6.11.0-1013.13, 6.11.0-1013.13~24.04.1
linux-image-6.11.0-1013-gcp (Ubuntu package) - update to 6.11.0-1013.13
linux-image-6.11.0-1013-gcp-64k (Ubuntu package) - update to 6.11.0-1013.13
linux-image-gcp (Ubuntu package) - update to 6.11.0-1013.13
linux-image-oracle-64k (Ubuntu package) - update to 6.11.0-1014.15
linux-image-oracle (Ubuntu package) - update to 6.11.0-1014.15
linux-image-6.11.0-1014-oracle (Ubuntu package) - update to 6.11.0-1014.15
linux-image-6.11.0-1014-oracle-64k (Ubuntu package) - update to 6.11.0-1014.15
linux-image-6.11.0-1020-oem (Ubuntu package) - update to 6.11.0-1020.20
linux-image-oem-24.04b (Ubuntu package) - update to 6.11.0-1020.20

• https://git.kernel.org/stable/c/3f67e07873df3c6d9ce2582260b83732e1d3a40b
• https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.11
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13

• NULL pointer dereference in Linux kernel platform x86 driver
• Ubuntu update for linux
• Ubuntu update for linux-azure