CVE-2025-38528

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-38528
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject %p% format string in bprintf-like helpers static const char fmt[] = "%p%"; bpf_trace_printk(fmt, sizeof(fmt)); The above BPF program isn't rejected and causes a kernel warning at runtime: Please remove unsupported %\x00 in format string WARNING: CPU: 1 PID: 7244 at lib/vsprintf.c:2680 format_decode+0x49c/0x5d0 This happens because bpf_bprintf_prepare skips over the second %, detected as punctuation, while processing %p. This patch fixes it by not skipping over punctuation. %\x00 is then processed in the next iteration and rejected.

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/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 Patch
https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4 Patch
https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9 Patch
https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39 Patch
https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289 Patch
https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory Mailing List
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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

07 Jan 2026, 19:21

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 - () https://git.kernel.org/stable/c/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 - Patch
References () https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4 - () https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4 - Patch
References () https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9 - () https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9 - Patch
References () https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39 - () https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39 - Patch
References () https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289 - () https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289 - Patch
References () https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58 - () https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58 - Patch
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory, Mailing List

03 Nov 2025, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html -

28 Aug 2025, 15:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39 -

18 Aug 2025, 20:16

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Rechazo de la cadena de formato %p% en ayudantes similares a bprintf. static const char fmt[] = "%p%"; bpf_trace_printk(fmt, sizeof(fmt)); El programa BPF anterior no se rechaza y genera una advertencia del kernel en tiempo de ejecución: Por favor, elimine el %\x00 no compatible en la cadena de formato. ADVERTENCIA: CPU: 1 PID: 7244 en lib/vsprintf.c:2680 format_decode+0x49c/0x5d0. Esto ocurre porque bpf_bprintf_prepare omite el segundo %, detectado como signo de puntuación, al procesar %p. Este parche lo corrige al no omitir la puntuación. %\x00 se procesa en la siguiente iteración y se rechaza.

16 Aug 2025, 12:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-08-16 12:15

Updated : 2026-01-07 19:21

NVD link : CVE-2025-38528

Mitre link : CVE-2025-38528

CVE.ORG link : CVE-2025-38528

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
NVD-CWE-noinfo