CVE-2025-39745 addresses a bug in the Linux kernel's rcutorture test suite, specifically affecting kernels built with CONFIG_PREEMPT_RT=y (Real-Time Linux). The vulnerability caused a kernel "splat" (a type of warning or crash) during testing due to an incorrect check for disabled Bottom Halves (BH) in RT kernels. This vulnerability is rated Medium with a CVSS score of 5.5 (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), indicating it requires local access and has low attack complexity, but can lead to a denial of service. The fix involves using softirq_count() instead of preempt_count() to accurately determine if BH is disabled in RT environments. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage are minimal, suggesting low awareness and no immediate threat from this specific issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.15.11CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 6.16, < 6.16.2CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.