Answer in brief
CVE-2025-38528 records a Unknown severity vulnerability in bpf: Reject %p% format string in bprintf-like helpers. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-38528 records a Unknown severity vulnerability in bpf: Reject %p% format string in bprintf-like helpers. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <97303e541e12f1fea97834ec64b98991e8775f39 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <61d5fa45ed13e42af14c7e959baba9908b8ee6d4 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <e7be679124bae8cf4fa6e40d7e1661baddfb3289 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <6952aeace93f8c9ea01849efecac24dd3152c9c9 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <f8242745871f81a3ac37f9f51853d12854fd0b58 | 97303e541e12f1fea97834ec64b98991e8775f39, 61d5fa45ed13e42af14c7e959baba9908b8ee6d4, e7be679124bae8cf4fa6e40d7e1661baddfb3289, 6952aeace93f8c9ea01849efecac24dd3152c9c9, 1c5f5fd47bbda17cb885fe6f03730702cd53d3f8, f8242745871f81a3ac37f9f51853d12854fd0b58 |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
Aug 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <97303e541e12f1fea97834ec64b98991e8775f39 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <61d5fa45ed13e42af14c7e959baba9908b8ee6d4 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <e7be679124bae8cf4fa6e40d7e1661baddfb3289 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <6952aeace93f8c9ea01849efecac24dd3152c9c9 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 || >=48cac3f4a96ddf08df8e53809ed066de0dc93915 <f8242745871f81a3ac37f9f51853d12854fd0b58 | 97303e541e12f1fea97834ec64b98991e8775f39, 61d5fa45ed13e42af14c7e959baba9908b8ee6d4, e7be679124bae8cf4fa6e40d7e1661baddfb3289, 6952aeace93f8c9ea01849efecac24dd3152c9c9, 1c5f5fd47bbda17cb885fe6f03730702cd53d3f8, f8242745871f81a3ac37f9f51853d12854fd0b58 |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
Aug 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.