CVE-2026-80610

In the Linux kernel, the following vulnerability has been resolved: net: enetc: fix potential divide-by-zero when num_vsi is zero For i.MX94 series, all the standalone ENETCs do not support SR-IOV, so pf->caps.num_vsi is zero. This leads to a divide-by-zero in enetc4_default_rings_allocation() when distributing rings among PF and VFs. Division by zero is undefined behavior in C. On ARM64, the UDIV/SDIV instructions silently return zero rather than raising an exception, so the issue does not cause a visible crash. However, relying on this behavior is incorrect and poses a cross-platform compatibility risk. Add an explicit check for num_vsi == 0 and return early after the PF's rings have been configured.

• https://git.kernel.org/stable/c/5da65537792b68b6052ffcab65e04c27aea6dfe4
• https://git.kernel.org/stable/c/cd37bcb67f909a8683cc8c38a63ac7367a7f6161

Published

Aug 28, 2026

Last Modified

Aug 28, 2026

Status

Received

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