CVE-2026-43113 (GCVE-0-2026-43113)
Vulnerability from cvelistv5
Published
2026-05-06 07:40
Modified
2026-08-05 12:26
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: wl1251: validate packet IDs before indexing tx_frames wl1251_tx_packet_cb() uses the firmware completion ID directly to index the fixed 16-entry wl->tx_frames[] array. The ID is a raw u8 from the completion block, and the callback does not currently verify that it fits the array before dereferencing it. Reject completion IDs that fall outside wl->tx_frames[] and keep the existing NULL check in the same guard. This keeps the fix local to the trust boundary and avoids touching the rest of the completion flow.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
Version: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ti/wl1251/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.31"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.258",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
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                {
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                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wl1251: validate packet IDs before indexing tx_frames\n\nwl1251_tx_packet_cb() uses the firmware completion ID directly to index\nthe fixed 16-entry wl-\u003etx_frames[] array. The ID is a raw u8 from the\ncompletion block, and the callback does not currently verify that it\nfits the array before dereferencing it.\n\nReject completion IDs that fall outside wl-\u003etx_frames[] and keep the\nexisting NULL check in the same guard. This keeps the fix local to the\ntrust boundary and avoids touching the rest of the completion flow."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable completion path belongs to a Wi-Fi driver and is reached through wl1251 transmit-completion processing after wireless activity. The highest defensible scenario is a radio-adjacent attacker influencing firmware TX results on the local Wi-Fi medium.\nAC:L - There is no race or hard timing requirement in the vulnerable callback. Once the TX-result path is reached, one completion record with an out-of-range u8 packet ID is enough to trigger the out-of-bounds access.\nPR:N - The TX completion interrupt path performs no attacker credential or authorization check before trusting the firmware completion ring. A radio-adjacent attacker does not need an account or local privileges on the victim.\nUI:N - Completion records are processed automatically by the driver when the device raises a TX-result interrupt. Exploitation does not require the victim to open a file, mount anything, or perform a deliberate action.\nS:U - The vulnerable component is a kernel Wi-Fi driver and the impacts are to the same kernel security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary crossing.\nC:H - The unchecked u8 index can read a pointer outside the fixed 16-entry tx_frames array and then treat that memory as an skb. As kernel memory corruption, this is defensibly scoreable as high confidentiality impact.\nI:H - The old code can write NULL back through wl-\u003etx_frames[result-\u003eid] out of bounds and can also mutate fields through a bogus skb pointer. That is kernel memory corruption with potential control-flow or data-integrity impact.\nA:H - An out-of-bounds pointer dereference or write in this kernel path can readily cause an oops, panic, or device/driver failure. Availability impact is therefore high."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:26:00.700Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6509dbece7339dbc8980c706b9d623119a6de105"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8a11a876f0a97061ee5d9e61d0f5a0df7e241c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0dc1ad870d6788b049bfe1511ac75b2333a7550"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6ba1eacf276063ebeefbbae8056043c24f2efaf"
        },
        {
          "url": "https://git.kernel.org/stable/c/df15adc692a802636dd3f258fc7cca8bf7a0ed9a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d7465be5163a923ee5d7459719ef5a021c1584a"
        },
        {
          "url": "https://git.kernel.org/stable/c/26ee518695c484f75e3606d631278e84bd24ae02"
        },
        {
          "url": "https://git.kernel.org/stable/c/0fd56fad9c56356e7fa7a7c52e7ecbf807a44eb0"
        }
      ],
      "title": "wifi: wl1251: validate packet IDs before indexing tx_frames",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43113",
    "datePublished": "2026-05-06T07:40:39.234Z",
    "dateReserved": "2026-05-01T14:12:55.986Z",
    "dateUpdated": "2026-08-05T12:26:00.700Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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