Vulnerability in Linux
CVE-2025-21659
In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock. napi_by_id() can become static now, but it needs to move because of dev_get_by_napi_id().
EPSS: 0.002 (7.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H.
Affected products
- Linux — versions 27f91aaf49b3a50e5a02ad5fa27b7c453d029a72, 6.8, 0
- Linux Linux_kernel — versions 6.13
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-21659?
- CVE-2025-21659 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2025-01-21.
- How severe is CVE-2025-21659?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2025-21659 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.