What’s Vulnerable › Vulnerabilities

CVE-2026-93104: RDMA/rvt: Return NULL after port allocation failure

• 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: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rvt: Return NULL after port allocation failure rvt_alloc_device() deallocates the IB device when its port array cannot be allocated but then returns the pointer to the released allocation. Callers treat any non-NULL value as valid and dereference it, resulting in a use-after-free. Return NULL immediately after deallocation so callers can propagate the allocation failure.

Affected products

• Linux: 4.6 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f
• https://git.kernel.org/stable/c/32d2cdb0f3cac430b04124c3b7248851fe2037f8
• https://git.kernel.org/stable/c/5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1
• https://git.kernel.org/stable/c/80968b42d13080bf7bc1f3ee17fef126ce2ad98f
• https://git.kernel.org/stable/c/b1e1b25723af44328524c7b54433e4bf0ab9930c
• https://git.kernel.org/stable/c/b7129930d1ec46c03a0de07fdce6c29f75795006

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