{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/wangxun/txgbe/txgbe_aml.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "febcced6958158e7e90a55a8567b3f5c3639c0b9",
              "status": "affected",
              "version": "9b97b6b5635b3de18debd07a3adcf25198ec8299",
              "versionType": "git"
            },
            {
              "lessThan": "6a905a71fd43ce8b45f05044b11491337f232c9d",
              "status": "affected",
              "version": "9b97b6b5635b3de18debd07a3adcf25198ec8299",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/wangxun/txgbe/txgbe_aml.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: txgbe: fix heap overflow when reading module EEPROM\n\ntxgbe_read_eeprom_hostif() always copies round_up(length, 4) bytes\ninto the caller buffer, which ethtool allocates with exactly \u0027length\u0027\nbytes. A non-4-aligned length therefore causes an out-of-bounds write.\nCopy only the remaining bytes on the final dword instead."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is triggered through the ethtool genetlink interface (ETHTOOL_MSG_MODULE_EEPROM_GET) from a local socket; no network packet or remote peer data reaches the vulnerable copy loop.\nAC:L - The attacker fully controls the request length attribute (policy allows 1..128 with no alignment constraint), so any non-4-aligned value deterministically triggers the over-copy on every call, repeatably and without racing.\nPR:L - The ethtool op is gated by GENL_UNS_ADMIN_PERM, i.e. ns-capable CAP_NET_ADMIN in the user namespace owning the netdev\u0027s netns, which an unprivileged user can obtain via unshare -Urn rather than real root.\nUI:N - The attacker issues the ethtool netlink request directly; no victim action, module plug event, or administrator step is needed.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The overflow is a heap memory-corruption primitive adjacent to attacker-groomable slab objects, and corrupting neighbouring object metadata (lengths, pointers) can be leveraged to disclose arbitrary kernel memory back through the same ethtool reply.\nI:H - This is an out-of-bounds heap write with firmware/module-supplied bytes past the end of a caller-sized kmalloc buffer, giving an attacker-triggerable corruption of adjacent kernel data that can be steered toward control-flow hijacking.\nA:H - Corrupting adjacent slab objects or allocator metadata leads to kernel oops/panic, and on KASAN or hardened configurations the slab-out-of-bounds write itself aborts the kernel, so a repeatable denial of service is available."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:05:37.444Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/febcced6958158e7e90a55a8567b3f5c3639c0b9"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a905a71fd43ce8b45f05044b11491337f232c9d"
        }
      ],
      "title": "net: txgbe: fix heap overflow when reading module EEPROM",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68440",
    "datePublished": "2026-08-12T00:07:29.605Z",
    "dateReserved": "2026-07-30T09:28:09.394Z",
    "dateUpdated": "2026-08-17T05:05:37.444Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}