CVE-2025-38528

Source
https://nvd.nist.gov/vuln/detail/CVE-2025-38528
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38528.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-38528
Downstream
Related
Published
2025-08-16T12:15:28Z
Modified
2025-08-30T18:00:20Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Reject %p% format string in bprintf-like helpers

static const char fmt[] = "%p%"; bpftraceprintk(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 bpfbprintfprepare 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.

References

Affected packages