CVE-2025-37948: debian debian_linux
Vulnerability summary
CVE-2025-37948 is a medium (CVSS 5.5) vulnerability in debian debian_linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 49 · Related 44Timeline
- 20-05-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs A malicious BPF program may manipulate the branch history to influence what the hardware speculates will happen next. On exit from a BPF program, emit the BHB mititgation sequence. This is only applied for 'classic' cBPF programs that are loaded by seccomp.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
+0.01 pp
From 0.19% 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
Ubuntu145 products
- linuxAll versions (No fix recorded) | < 5.15.0-156.166 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1092.99 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.140-1 | < 6.12.29-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < c6a8735d841bcb7649734bb3a787bb174c67c0d8 | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 993f63239c219696aef8887a4e7d3a16bf5a8ece | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 8fe5c37b0e08a97cf0210bb75970e945aaaeebab | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 42a20cf51011788f04cf2adbcd7681f02bdb6c27 | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 38c345fd54afd9d6ed8d3fcddf3f6ea23887bf78 | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 852b8ae934b5cbdc62496fa56ce9969aa2edda7f | ≥ 0be7320a635c2e434e8b67e0e9474a85ceb421c4, < 0dfefc2ea2f29ced2416017d7e5b1253a54c2735 | 3.7
- linux_kernel< 5.10.239 | ≥ 5.11, < 5.15.186 | ≥ 5.16, < 6.1.139 | ≥ 6.2, < 6.6.91 | ≥ 6.7, < 6.12.29 | ≥ 6.13, < 6.14.7 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3 | 6.15:rc4 | 6.15:rc5 | 6.15:rc6
3 vendors · 149 products
References
42 links- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlThird Party Advisory