CVE-2026-63985
ethtool: eeprom: add more safeties to EEPROM Netlink fallback
Description
In 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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 30, 2026, 2:51 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to include the ethtool EEPROM safety patch.
- Ensure offset and length do not exceed EEPROM bounds.
- Use zalloc for EEPROM fallback buffers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63985.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63985 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63985
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63985 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63985 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': '0e182689831277faf2ef683573a60474c208f690', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': '6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': '65674d2489a12b8efd2ca0effb3de1d12224b596', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': 'd81376053a00865c70b8d8506a1cb93f2943d413', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': 'fd0de51c54fa8474a0ddeedd71c65ad09fada390', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': '4fe1bc4b3603f621240d5b401742f302190db769', 'versionType': 'git'}, {'status': 'affected', 'version': '96d971e307cc0e434f96329b42bbd98cfbca07d2', 'lessThan': '67cfdd9210b99f260b3e0afeb9525e0acc7be31e', 'versionType': 'git'}], 'programFiles': ['net/ethtool/eeprom.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.12', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ethtool/eeprom.c'], 'defaultStatus': 'affected'}] Added Description In 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. Added Reference https://git.kernel.org/stable/c/0e182689831277faf2ef683573a60474c208f690 Added Reference https://git.kernel.org/stable/c/4fe1bc4b3603f621240d5b401742f302190db769 Added Reference https://git.kernel.org/stable/c/65674d2489a12b8efd2ca0effb3de1d12224b596 Added Reference https://git.kernel.org/stable/c/67cfdd9210b99f260b3e0afeb9525e0acc7be31e Added Reference https://git.kernel.org/stable/c/6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1 Added Reference https://git.kernel.org/stable/c/d81376053a00865c70b8d8506a1cb93f2943d413 Added Reference https://git.kernel.org/stable/c/fd0de51c54fa8474a0ddeedd71c65ad09fada390