What’s Vulnerable › Vulnerabilities

CVE-2025-68338: net: dsa: microchip: Don't free uninitialized ksz_irq

• 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: 2025-12-23 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Don't free uninitialized ksz_irq If something goes wrong at setup, ksz_irq_free() can be called on uninitialized ksz_irq (for example when ksz_ptp_irq_setup() fails). It leads to freeing uninitialized IRQ numbers and/or domains. Use dsa_switch_for_each_user_port_continue_reverse() in the error path to iterate only over the fully initialized ports.

Affected products

• Linux kernel: 6.3 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/25b62cc5b22c45face094ae3e8717258e46d1d19
• https://git.kernel.org/stable/c/32abbcf4379a0f851d7eb9d4389e7bf5c64bf6c0
• https://git.kernel.org/stable/c/9428654c827fa8d38b898135d26d39ee2d544246

Get alerted when CVE-2025-68338 or the next vulnerability affects your stack