What’s Vulnerable › Vulnerabilities

CVE-2023-53191: irqchip/alpine-msi: Fix refcount leak in alpine_msix_init_domains

• 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: 2025-09-15 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: irqchip/alpine-msi: Fix refcount leak in alpine_msix_init_domains of_irq_find_parent() returns a node pointer with refcount incremented, We should use of_node_put() on it when not needed anymore. Add missing of_node_put() to avoid refcount leak.

Affected products

• Linux kernel: from 4.6 before 4.14.308; from 4.15 before 4.19.276; from 4.20 before 5.4.235; from 5.5 before 5.10.173; from 5.11 before 5.15.99; from 5.16 before 6.1.16 — fixed in 4.14.308, 4.19.276, 5.10.173, 5.15.99, 5.4.235, 6.1.16

How to fix

Upgrade to a fixed version: Linux kernel 4.14.308, 4.19.276, 5.10.173, 5.15.99. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/071d068b89e95d1b078aa6bbcb9d0961b77d6aa1
• https://git.kernel.org/stable/c/5fbf2cc39b62a4afe44f3d42ee3dcf8f012c1926
• https://git.kernel.org/stable/c/65e30bd1310d90b794c377bf405394157854aa30
• https://git.kernel.org/stable/c/9e79ac4f70fd51243e1c6108d4b0baf16cfde99c
• https://git.kernel.org/stable/c/c9aaf4efe1f02b2fef21a69fb3652f5ad12a5710
• https://git.kernel.org/stable/c/d6c66c46889752fa4962c6388516f7ab66a8d6a1
• https://git.kernel.org/stable/c/eef04516f0c317ce80502c1d6b0d06235a87cd8f
• https://git.kernel.org/stable/c/eef09f786df4b34b97557929287c4e5a83bbf09b

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