What’s Vulnerable › Vulnerabilities

CVE-2023-53332: genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-16 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask() If ipi_send_{mask|single}() is called with an invalid interrupt number, all the local variables there will be NULL. ipi_send_verify() which is invoked from these functions does verify its 'data' parameter, resulting in a kernel oops in irq_data_get_affinity_mask() as the passed NULL pointer gets dereferenced. Add a missing NULL pointer check in ipi_send_verify()... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

Affected products

• Linux kernel: from 4.6 before 6.1.18; from 6.2 before 6.2.5 — fixed in 6.1.18, 6.2.5

How to fix

Upgrade to a fixed version: Linux kernel 6.1.18, 6.2.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/7448c73d64075051f50caed2c62f46553b69ab8a
• https://git.kernel.org/stable/c/926aef60ea64cd9becf2829f7388f48dbe8bcb11
• https://git.kernel.org/stable/c/feabecaff5902f896531dde90646ca5dfa9d4f7d

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