ethtool: eeprom: add more safeties to EEPROM Netlink fallback

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63985
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:17 UTC
Updated2026-07-20 15:17:00 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ethtool: eeprom: add more safeties to EEPROM Netlink fallback The Netlink fallback path for reading module EEPROM (fallback_set_params()) validates that offset < eeprom_len, but does not check that offset + length stays within eeprom_len. The ioctl equivalent (ethtool_get_any_eeprom() in ioctl.c) has always enforced both bounds: if (eeprom.offset + eeprom.len > total_len) return -EINVAL; This could lead to surprises in both drivers and device FW. Add the missing offset + length validation to fallback_set_params(), mirroring the ioctl. Similarly - ethtool core in general, and ethtool_get_any_eeprom() in particular tries to zero-init all buffers passed to the drivers to avoid any extra work of zeroing things out. eeprom_fallback() uses a plain kmalloc(), change it to zalloc.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001720000 probability, percentile 0.069010000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 0e182689831277faf2ef683573a60474c208f690 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 65674d2489a12b8efd2ca0effb3de1d12224b596 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 d81376053a00865c70b8d8506a1cb93f2943d413 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 fd0de51c54fa8474a0ddeedd71c65ad09fada390 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 4fe1bc4b3603f621240d5b401742f302190db769 git Not specified
CNA Linux Linux affected 96d971e307cc0e434f96329b42bbd98cfbca07d2 67cfdd9210b99f260b3e0afeb9525e0acc7be31e git Not specified
CNA Linux Linux affected 5.13 Not specified
CNA Linux Linux unaffected 5.13 semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/67cfdd9210b99f260b3e0afeb9525e0acc7be31e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4fe1bc4b3603f621240d5b401742f302190db769 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/65674d2489a12b8efd2ca0effb3de1d12224b596 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fd0de51c54fa8474a0ddeedd71c65ad09fada390 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0e182689831277faf2ef683573a60474c208f690 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d81376053a00865c70b8d8506a1cb93f2943d413 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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