CVE-2025-38528: debian debian_linux
Vulnerability summary
CVE-2025-38528 is a high (CVSS 7.1) vulnerability in debian debian_linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.1% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 48 · Related 47Timeline
- 16-08-2025PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
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 metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
+0.01 pp
From 0.16% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu135 products
- linux< 5.15.0-163.173 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1097.104 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.147-1 | < 6.12.41-1 | < 6.16.3-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < 97303e541e12f1fea97834ec64b98991e8775f39 | ≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < 61d5fa45ed13e42af14c7e959baba9908b8ee6d4 | ≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < e7be679124bae8cf4fa6e40d7e1661baddfb3289 | ≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < 6952aeace93f8c9ea01849efecac24dd3152c9c9 | ≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < 1c5f5fd47bbda17cb885fe6f03730702cd53d3f8 | ≥ 48cac3f4a96ddf08df8e53809ed066de0dc93915, < f8242745871f81a3ac37f9f51853d12854fd0b58 | 5.13
- linux_kernel≥ 5.13, < 5.15.190 | ≥ 5.16, < 6.1.147 | ≥ 6.2, < 6.6.100 | ≥ 6.7, < 6.12.40 | ≥ 6.13, < 6.15.8 | 6.16:rc1 | 6.16:rc2 | 6.16:rc3 | 6.16:rc4 | 6.16:rc5 | 6.16:rc6
3 vendors · 139 products
