CVE-2025-38528

MEDIUM EPSS 4.2%
Published Aug 16, 202510mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 16, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥5.13  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.147
linuxlinux_kernel*≥6.2  –  <6.6.100
linuxlinux_kernel*≥6.7  –  <6.12.40
linuxlinux_kernel*≥6.13  –  <6.15.8
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
debiandebian_linux11.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58
    Patch