PT-2025-8895 · Linux+4 · Linux Kernel+4

Published 2025-02-13 · Updated 2026-04-20 · CVE-2025-21783

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A crash issue in the Linux kernel has been resolved. The problem occurs when the gpiochip get ngpios() function is called, which uses chip *() macros to print messages. However, these macros rely on gpiodev being initialized and set, which is not the case when called via bgpio init(). This results in a crash due to a NULL pointer dereference. The fix involves replacing the chip *() macros with the respective dev *() ones to avoid the crash.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2025-12647

AZL-57926

BDU:2025-12196

CVE-2025-21783

OESA-2025-1285

OESA-2025-1286

USN-7521-1

USN-7521-2

USN-7521-3

USN-7703-1

USN-7703-2

USN-7703-3

USN-7703-4

USN-7719-1

USN-7737-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Ubuntu

References · 364

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21783.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2024-56783 · Security Note
• https://ubuntu.com/security/CVE-2025-21792 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1286 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21732 · Security Note
• https://ubuntu.com/security/CVE-2024-57997 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21783 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-53148 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-54456 · Security Note
• https://ubuntu.com/security/CVE-2025-21766 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58076 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58011 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56603 · Security Note
• https://ubuntu.com/security/CVE-2025-21859 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56593 · Security Note