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ethtool: eeprom: add more safeties to EEPROM Netlink fallback

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-63985

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-63985

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "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"
  }
]
Related CVEs
CVE-2026-63985

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40920 · Revision 1
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Publisher date
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