CVE-2025-38528 Affecting kernel-livepatch-6_4_0-150700_53_16-default package, versions <1-150700.15.3.2


Severity

Recommended
medium

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (9th percentile)

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  • Snyk IDSNYK-SLES157-KERNELLIVEPATCH6401507005316DEFAULT-13006507
  • published23 Sept 2025
  • disclosed22 Sept 2025

Introduced: 22 Sep 2025

NewCVE-2025-38528  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-livepatch-6_4_0-150700_53_16-default to version 1-150700.15.3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150700_53_16-default package and not the kernel-livepatch-6_4_0-150700_53_16-default package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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 Base Scores

version 3.1