CVE-2026-98887

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-23 12:18:22.460000

Last modified

2026-10-26 07:17:13.743000

View original CVE JSON

{
  "id": "CVE-2026-98887",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-23T12:18:22.460",
  "lastModified": "2026-10-26T07:17:13.743",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO\n\nhwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload\nto a struct hwsim_tx_rate * and unconditionally reads\nIEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds\nthe attribute from above (NLA_BINARY .len is a maximum) and the op sets\nGENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is\naccepted and the loop reads past the payload.\n\nRequire the exact length in the policy, so a malformed attribute is\nrejected before the handler runs."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "3a96bb65b4b820d8b41fa155781ec1c29e3479d4",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "59e1f2a0242232b4a3af144ae317d3913fc09046",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "1ae85bb34fe3510659b86d6a5f8036dd498233f8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "b5b1234bbfa25537fb9a5c0d62c328ed4547f721",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "lessThan": "3dc723ac78a6e4fa0fd49e27e487ed319da40a9f",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.7",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.271",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.222",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.189",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.158",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1ae85bb34fe3510659b86d6a5f8036dd498233f8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3a96bb65b4b820d8b41fa155781ec1c29e3479d4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3dc723ac78a6e4fa0fd49e27e487ed319da40a9f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/59e1f2a0242232b4a3af144ae317d3913fc09046",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5b1234bbfa25537fb9a5c0d62c328ed4547f721",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}