GHSA-69M3-XQHX-P784
Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-63985"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T16:17:17Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: eeprom: add more safeties to EEPROM Netlink fallback\n\nThe Netlink fallback path for reading module EEPROM\n(fallback_set_params()) validates that offset \u003c eeprom_len,\nbut does not check that offset + length stays within eeprom_len.\nThe ioctl equivalent (ethtool_get_any_eeprom() in ioctl.c) has\nalways enforced both bounds:\n\n if (eeprom.offset + eeprom.len \u003e total_len)\n return -EINVAL;\n\nThis could lead to surprises in both drivers and device FW.\nAdd the missing offset + length validation to fallback_set_params(),\nmirroring the ioctl.\n\nSimilarly - ethtool core in general, and ethtool_get_any_eeprom()\nin particular tries to zero-init all buffers passed to the drivers\nto avoid any extra work of zeroing things out. eeprom_fallback()\nuses a plain kmalloc(), change it to zalloc.",
"id": "GHSA-69m3-xqhx-p784",
"modified": "2026-07-20T15:31:54Z",
"published": "2026-07-19T18:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63985"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0e182689831277faf2ef683573a60474c208f690"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4fe1bc4b3603f621240d5b401742f302190db769"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/65674d2489a12b8efd2ca0effb3de1d12224b596"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/67cfdd9210b99f260b3e0afeb9525e0acc7be31e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ed7ebe22e9c3e3e946b6973c1ce43d3c38aeac1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d81376053a00865c70b8d8506a1cb93f2943d413"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd0de51c54fa8474a0ddeedd71c65ad09fada390"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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