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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 08:16

Updated : 2026-08-28 08:16

NVD link : CVE-2026-80610

Mitre link : CVE-2026-80610

CVE.ORG link : CVE-2026-80610

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-80610", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2d673b0e2f8d75b66aa21e5ca5d95c415dec5be7", "lessThan": "cd37bcb67f909a8683cc8c38a63ac7367a7f6161", "versionType": "git"}, {"status": "affected", "version": "2d673b0e2f8d75b66aa21e5ca5d95c415dec5be7", "lessThan": "5da65537792b68b6052ffcab65e04c27aea6dfe4", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/freescale/enetc/enetc4_pf.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"status": "unaffected", "version": "0", "lessThan": "6.19", "versionType": "semver"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/freescale/enetc/enetc4_pf.c"], "defaultStatus": "affected"}]}], "published": "2026-08-28T08:16:44.987", "references": [{"url": "https://git.kernel.org/stable/c/5da65537792b68b6052ffcab65e04c27aea6dfe4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cd37bcb67f909a8683cc8c38a63ac7367a7f6161", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: fix potential divide-by-zero when num_vsi is zero\n\nFor i.MX94 series, all the standalone ENETCs do not support SR-IOV, so\npf->caps.num_vsi is zero. This leads to a divide-by-zero in\nenetc4_default_rings_allocation() when distributing rings among PF and\nVFs.\n\nDivision by zero is undefined behavior in C. On ARM64, the UDIV/SDIV\ninstructions silently return zero rather than raising an exception, so\nthe issue does not cause a visible crash. However, relying on this\nbehavior is incorrect and poses a cross-platform compatibility risk.\n\nAdd an explicit check for num_vsi == 0 and return early after the PF's\nrings have been configured."}], "lastModified": "2026-08-28T08:16:44.987", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}