← Back to CVE Explorer

CVE-2026-68353

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler The firmware-controlled num_msg field (u8, 0-255) drives the loop in ath6kl_wmi_tx_complete_event_rx() without validation against the buffer length. This allows out-of-bounds reads of up to 1020 bytes past the WMI event buffer when the firmware sends an inflated num_msg. Add a check that the buffer is large enough to hold the fixed struct and the num_msg variable-length entries.

Severity
HIGH
CVSS score
8.1 (v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-10 13:20:27.567000
Last modified
2026-10-19 22:17:14.563000
View original CVE JSON 
{
  "id": "CVE-2026-68353",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-10T13:20:27.567",
  "lastModified": "2026-10-19T22:17:14.563",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler\n\nThe firmware-controlled num_msg field (u8, 0-255) drives the loop in\nath6kl_wmi_tx_complete_event_rx() without validation against the buffer\nlength. This allows out-of-bounds reads of up to 1020 bytes past the\nWMI event buffer when the firmware sends an inflated num_msg.\n\nAdd a check that the buffer is large enough to hold the fixed struct\nand the num_msg variable-length entries."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/wireless/ath/ath6kl/wmi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "5297299c3fa6133275db0be99d69cd759b6cbfe9",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "35196a07603f8c94a4943093bc26d5b5826285f8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "0e0fc04af9b443c6b425f00fb604ff599bc80d1d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "69ac7ba3a3df6654e7daa82674575a8c4a1a63ea",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "289edc3c71344b89e6522891147cfb8f61b088bb",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "eb636fbc443149b3501c3f97e26225ddcb314a0f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "c38b0d5c661951b5dd082bdf31f8a57a0ce6e540",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
              "lessThan": "3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/wireless/ath/ath6kl/wmi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3.2",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "3.2",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.265",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.216",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.183",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.148",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.101",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.42",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.6",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-16T15:47:25.988106Z",
          "id": "CVE-2026-68353",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5297299c3fa6133275db0be99d69cd759b6cbfe9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}