CVE-2025-38528

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Source
https://cve.org/CVERecord?id=CVE-2025-38528
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38528.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38528
Downstream
Related
Published
2025-08-16T11:12:21.667Z
Modified
2026-03-12T02:19:23.562239Z
Summary
bpf: Reject %p% format string in bprintf-like helpers
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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38528.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
48cac3f4a96ddf08df8e53809ed066de0dc93915
Fixed
97303e541e12f1fea97834ec64b98991e8775f39
Fixed
61d5fa45ed13e42af14c7e959baba9908b8ee6d4
Fixed
e7be679124bae8cf4fa6e40d7e1661baddfb3289
Fixed
6952aeace93f8c9ea01849efecac24dd3152c9c9
Fixed
1c5f5fd47bbda17cb885fe6f03730702cd53d3f8
Fixed
f8242745871f81a3ac37f9f51853d12854fd0b58

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38528.json"