CVE-2025-38528
N/A
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < 97303e541e12f1fea97834ec64b98991e8775f39 | affected |
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < 61d5fa45ed13e42af14c7e959baba9908b8ee6d4 | affected |
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < e7be679124bae8cf4fa6e40d7e1661baddfb3289 | affected |
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < 6952aeace93f8c9ea01849efecac24dd3152c9c9 | affected |
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < 1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 | affected |
| Linux | Linux | 48cac3f4a96ddf08df8e53809ed066de0dc93915 < f8242745871f81a3ac37f9f51853d12854fd0b58 | affected |
| Linux | Linux | 5.13 | affected |
| Linux | Linux | 0 < 5.13 | unaffected |
| Linux | Linux | 5.15.190 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.147 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.100 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.40 <= 6.12.* | unaffected |
| Linux | Linux | 6.15.8 <= 6.15.* | unaffected |
| Linux | Linux | 6.16 <= * | unaffected |
Weaknesses
ADP Enrichment
CVE Program Container
Additional References
References
- https://git.kernel.org/stable/c/97303e541e12f1fea97834ec64b98991e8775f39
- https://git.kernel.org/stable/c/61d5fa45ed13e42af14c7e959baba9908b8ee6d4
- https://git.kernel.org/stable/c/e7be679124bae8cf4fa6e40d7e1661baddfb3289
- https://git.kernel.org/stable/c/6952aeace93f8c9ea01849efecac24dd3152c9c9
- https://git.kernel.org/stable/c/1c5f5fd47bbda17cb885fe6f03730702cd53d3f8
- https://git.kernel.org/stable/c/f8242745871f81a3ac37f9f51853d12854fd0b58
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.