CVE-2025-21986 is a Linux kernel vulnerability affecting the net:switchdev component. It arises from a recursive locking issue in the blocking switchdev notification chain, where a read-write semaphore is acquired twice for reading, leading to lockdep warnings and potential deadlocks. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity and a high impact on availability (denial of service). There is currently no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 6.1.80, < 6.1.132CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 6.6.19, < 6.6.84CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 6.7.7, < 6.8CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 6.8.1, < 6.12.20CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 6.13, < 6.13.8CPE 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
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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.
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