CVE-2024-57890: RDMA/uverbs: Prevent integer overflow issue

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: 2025-01-15 · updated 2026-06-17
Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Prevent integer overflow issue In the expression "cmd.wqe_size * cmd.wr_count", both variables are u32 values that come from the user so the multiplication can lead to integer wrapping. Then we pass the result to uverbs_request_next_ptr() which also could potentially wrap. The "cmd.sge_count * sizeof(struct ib_uverbs_sge)" multiplication can also overflow on 32bit systems although it's fine on 64bit systems. This patch does two things. First, I've re-arranged the condition in uverbs_request_next_ptr() so that the use controlled variable "len" is on one side of the comparison by itself without any math. Then I've modified all the callers to use size_mul() for the multiplications.

Affected products

Linux kernel: from 2.6.15 before 5.4.289; from 5.5 before 5.10.233; from 5.11 before 5.15.176; from 5.16 before 6.1.124; from 6.2 before 6.6.70; from 6.7 before 6.12.9 — fixed in 5.10.233, 5.15.176, 5.4.289, 6.1.124, 6.12.9, 6.6.70

How to fix

Upgrade to a fixed version: Linux kernel 5.10.233, 5.15.176, 5.4.289, 6.1.124. Check the vendor advisory for mitigations.

References

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