What’s Vulnerable › Vulnerabilities

CVE-2025-68300: fs/namespace: fix reference leak in grab_requested_mnt_ns

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already takes a reference on mnt_ns. grab_requested_mnt_ns() doesn't need to take an extra reference.

Affected products

• Linux kernel: from 6.12.59 before 6.12.61; from 6.17.9 before 6.17.11 — fixed in 6.12.61, 6.17.11

How to fix

Upgrade to a fixed version: Linux kernel 6.12.61, 6.17.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4a16b2a0c1f033f95f5d0b98b9e40e8bf7c4c2c5
• https://git.kernel.org/stable/c/7b6dcd9bfd869eee7693e45b1817dac8c56e5f86
• https://git.kernel.org/stable/c/fe256e59b8e7f126b2464ee32bd9fee131f0a883

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