FKIE_CVE-2026-90221

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-10-19 09:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing nci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse the CORE_INIT_RSP packet without validating that the skb contains enough data. A malformed response (e.g. injected via virtual_ncidev) can declare a large num_supported_rf_interfaces while providing insufficient data, causing reads of uninitialized slab memory. This is later used in nci_init_complete_req(), triggering a KMSAN uninit-value warning. Add skb length checks before accessing packet fields: - Validate the skb has at least 1 byte for the status field. - Validate the skb can hold the fixed-size header before parsing. - In v2, bounds-check each variable-length rf_interface entry and its extension parameters within the parsing loop. - In v1, verify the skb is large enough for both the variable-length rf_interfaces array and the trailing rsp_2 structure.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/baed3fdf6ed2195c56f25ae18a086b938dcd3983
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/rsp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "baed3fdf6ed2195c56f25ae18a086b938dcd3983",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "2f434478771a4ebdd535033561c0590bcde39753",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "4f0483bbcdaccc9d4aee30df7351863334cecfa7",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "7d44b897bff84edcd4814899314d661ad4956a8e",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            },
            {
              "lessThan": "d56575a2595ee1f597f39e8a1cfb67ed3501678d",
              "status": "affected",
              "version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/rsp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing\n\nnci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse\nthe CORE_INIT_RSP packet without validating that the skb contains\nenough data. A malformed response (e.g. injected via virtual_ncidev)\ncan declare a large num_supported_rf_interfaces while providing\ninsufficient data, causing reads of uninitialized slab memory. This\nis later used in nci_init_complete_req(), triggering a KMSAN\nuninit-value warning.\n\nAdd skb length checks before accessing packet fields:\n- Validate the skb has at least 1 byte for the status field.\n- Validate the skb can hold the fixed-size header before parsing.\n- In v2, bounds-check each variable-length rf_interface entry and its\n  extension parameters within the parsing loop.\n- In v1, verify the skb is large enough for both the variable-length\n  rf_interfaces array and the trailing rsp_2 structure."
    }
  ],
  "id": "CVE-2026-90221",
  "lastModified": "2026-10-19T09:19:12.287",
  "metrics": {},
  "published": "2026-09-17T17:17:17.550",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/baed3fdf6ed2195c56f25ae18a086b938dcd3983"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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