What’s Vulnerable › Vulnerabilities

CVE-2025-40010: afs: Fix potential null pointer dereference in afs_put_server

• 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: 2025-10-20 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: afs: Fix potential null pointer dereference in afs_put_server afs_put_server() accessed server->debug_id before the NULL check, which could lead to a null pointer dereference. Move the debug_id assignment, ensuring we never dereference a NULL server pointer.

Affected products

• Linux kernel: 6.0 — fixed in 6.17

How to fix

Upgrade to a fixed version: Linux kernel 6.17. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/41782c44bb8431c43043129ae42f2ba614938479
• https://git.kernel.org/stable/c/7b8381f3c405b864a814d747e526e078c3ef4bc2
• https://git.kernel.org/stable/c/9158c6bb245113d4966df9b2ba602197a379412e
• https://git.kernel.org/stable/c/a13dbc5e20c7284b82afe6f08debdecf51d2ca04
• https://git.kernel.org/stable/c/cab278cead49a547ac84c3e185f446f381303eae

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