CVE-2025-21965

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21965
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl() If a BPF scheduler provides an invalid CPU (outside the nr_cpu_ids range) as prev_cpu to scx_bpf_select_cpu_dfl() it can cause a kernel crash. To prevent this, validate prev_cpu in scx_bpf_select_cpu_dfl() and trigger an scx error if an invalid CPU is specified.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/515680e76c536dd4aa8e2b5d674b0d441baddf5b Patch
https://git.kernel.org/stable/c/752b56bb76e2471197d25d6948d85753043b10da Patch
https://git.kernel.org/stable/c/9360dfe4cbd62ff1eb8217b815964931523b75b3 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:*
History

31 Oct 2025, 19:35

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched_ext: Validar prev_cpu en scx_bpf_select_cpu_dfl(). Si un programador BPF proporciona una CPU no válida (fuera del rango nr_cpu_ids) como prev_cpu a scx_bpf_select_cpu_dfl(), puede provocar un fallo del kernel. Para evitarlo, valide prev_cpu en scx_bpf_select_cpu_dfl() y genere un error scx si se especifica una CPU no válida.
CPE cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
References () https://git.kernel.org/stable/c/515680e76c536dd4aa8e2b5d674b0d441baddf5b - () https://git.kernel.org/stable/c/515680e76c536dd4aa8e2b5d674b0d441baddf5b - Patch
References () https://git.kernel.org/stable/c/752b56bb76e2471197d25d6948d85753043b10da - () https://git.kernel.org/stable/c/752b56bb76e2471197d25d6948d85753043b10da - Patch
References () https://git.kernel.org/stable/c/9360dfe4cbd62ff1eb8217b815964931523b75b3 - () https://git.kernel.org/stable/c/9360dfe4cbd62ff1eb8217b815964931523b75b3 - Patch
First Time Linux linux Kernel
Linux

01 Apr 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-01 16:15

Updated : 2025-10-31 19:35

NVD link : CVE-2025-21965

Mitre link : CVE-2025-21965

CVE.ORG link : CVE-2025-21965

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference