NULL pointer dereference in Linux kernel - CVE-2025-22002

Vulnerability identifier: #VU106959

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-22002

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 netfs_write_collection_worker() function in fs/netfs/write_collect.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-azure (Ubuntu package)
linux-oem-6.11 (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.13.9
linux (Ubuntu package) - addressed in versions 6.11.0-28.28, 6.11.0-28.28~24.04.1, 6.11.0-1011.11, 6.11.0-1014.14, 6.11.0-1015.16, 6.11.0-1016.16, 6.11.0-1016.16~24.04.1, 6.11.0-1017.18
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1015.16, 6.11.0-1015.16~24.04.2
linux-azure (Ubuntu package) - addressed in versions 6.11.0-1018.18, 6.11.0-1018.18~24.04.1
linux-oem-6.11 (Ubuntu package) - update to 6.11.0-1024.24

• https://git.kernel.org/stable/c/0def1a40c3e76a468f8f66aa572caed44ec37277
• https://git.kernel.org/stable/c/344b7ef248f420ed4ba3a3539cb0a0fc18df9a6c
• https://git.kernel.org/stable/c/c2d5d14a7bcbb045d0cd0095cefe95f2a4b91159
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.9

• NULL pointer dereference in Linux kernel netfs
• Ubuntu update for linux
• Ubuntu update for linux-oem-6.11
• Ubuntu update for linux-lowlatency
• Ubuntu update for linux-azure