Medium [CVE-2026-64225] add bounds check to cgx_speed_mbps index
This medium-severity Red Hat Linux advisory covers CVE-2026-64225 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux for NVIDIA 26.
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Summary
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: CGX: add bounds check to cgx_speed_mbps index cgx_speed_mbps has 13 elements but RESP_LINKSTAT_SPEED can yield values 0-15. If it returns a value >= 13, this causes an out-of-bounds array access.
Add a bounds check and default to speed 0 if the index is out of range. Specifically, the `RESP_LINKSTAT_SPEED` function can produce an index value that exceeds the allocated size of the `cgx_speed_mbps` array, leading to memory corruption.
This could result in a system crash (Denial of Service). A flaw was found in the Linux kernel octeontx2-af driver, in the CGX (Converged Gigabit Ethernet) firmware interface used by Marvell OcteonTX2 network adapters.
Because this index is not validated before use, an unexpected firmware response can cause an out-of-bounds array access, leading to memory corruption and a kernel crash. This is classified as CWE-125 (Out-of-bounds Read) and results in a Denial of Service impact.
Exploitation requires a system with an affected OcteonTX2 CGX-based network adapter present, consistent with the AV:L and PR:L values in the CVSS vector. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-125.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Mitigation checklist
- There is no mitigation for this issue other than applying the fix. Systems that do not use OcteonTX2 CGX-based network hardware are not affected.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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