NULL pointer dereference in Linux kernel - CVE-2025-21783

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Main Vulnerability Database Vulnerabilities #VU104992

NULL pointer dereference in Linux kernel - CVE-2025-21783

Published: February 27, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU104992
CSH Severity: Low
CVSS v4 BT: 4.3 [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/E:U/U:Clear]
CVE-ID: CVE-2025-21783
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to NULL pointer dereference within the gpiochip_get_ngpios() function in drivers/gpio/gpiolib.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Ubuntu
openEuler
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
linux (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-aws (Ubuntu package)

How to mitigate CVE-2025-21783

Install update from vendor's website.

Linux kernel - update to 6.12.16
bpftool - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
python3-perf-debuginfo - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
python3-perf - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
perf-debuginfo - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
perf - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-tools-devel - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-tools-debuginfo - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-tools - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-source - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-headers - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-devel - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-debugsource - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
kernel-debuginfo - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
bpftool-debuginfo - addressed in versions 6.6.0-82.0.0.75, 6.6.0-82.0.0.86
linux (Ubuntu package) - addressed in versions 6.8.0-78.78, 6.8.0-78.78.1, 6.8.0-78.78.1~22.04.1, 6.8.0-1035.37, 6.8.1-1030.31, 6.11.0-26.26, 6.11.0-26.26~24.04.1, 6.11.0-1010.10, 6.11.0-1013.13, 6.11.0-1015.15, 6.11.0-1015.15~24.04.1, 6.11.0-1022.22
linux-gke (Ubuntu package) - addressed in versions 6.8.0-78.78~22.04.1, 6.8.0-1032.36, 6.8.0-1035.38, 6.8.0-1035.38.1, 6.8.0-1035.38~22.04.1, 6.8.0-1035.39
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1019.21~22.04.1, 6.8.0-1033.33, 6.8.0-1033.33~22.04.1, 6.8.0-1035.37~22.04.1, 6.8.0-1036.38, 6.8.0-1036.38~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1022.23, 6.8.0-1034.39, 6.8.0-1034.39~22.04.1
linux-oracle (Ubuntu package) - update to 6.8.0-1032.33~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2028.29
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1014.15, 6.11.0-1014.15~24.04.1, 6.11.0-1016.17
linux-aws (Ubuntu package) - update to 6.11.0-1014.15

External References

Related Security Bulletins