What’s Vulnerable › Vulnerabilities

CVE-2025-38408: genirq/irq_sim: Initialize work context pointers properly

• Severity: medium (CVSS 5.5 v3.1)
• 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: 2025-07-25 · updated 2026-10-15
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: genirq/irq_sim: Initialize work context pointers properly Initialize `ops` member's pointers properly by using kzalloc() instead of kmalloc() when allocating the simulation work context. Otherwise the pointers contain random content leading to invalid dereferencing.

Affected products

• Linux kernel: from 5.8 before 6.12.37; from 6.13 before 6.15.6; 6.16-rc1, 6.16-rc2 — fixed in 6.12.37, 6.15.6

How to fix

Upgrade to a fixed version: Linux kernel 6.12.37, 6.15.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/186df821de0f34490ed5fc0861243748b2483861
• https://git.kernel.org/stable/c/19bd7597858dd15802c1d99fcc38e528f469080a
• https://git.kernel.org/stable/c/7f73d1def72532bac4d55ea8838f457a6bed955c
• https://git.kernel.org/stable/c/8a2277a3c9e4cc5398f80821afe7ecbe9bdf2819
• https://git.kernel.org/stable/c/c71aa4bb528ae6f8fd7577a0a39e5a03c60b04fb
• https://git.kernel.org/stable/c/ec3656a8cb428d763def32bc2fa695f94be23629

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