CVE-2026-97516 (GCVE-0-2026-97516)
Vulnerability from cvelistv5
Published
2026-09-24 16:05
Modified
2026-10-03 10:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result() It was recently reported that rtw_fw_adaptivity_result() in fw.c dereferences rtwdev->chip->edcca_th without a NULL check. The issue is that devices with the 8821CE chip don't define edcca_th in their chip info. As a result, when rtw_fw_adaptivity_result() tries to dereference it, the kernel triggers an oops. Add a NULL check for edcca_th before dereferencing it in rtw_fw_adaptivity_result() in fw.c. Placing the check at the function entry avoids logging any garbage values. This change does not address the root cause for this behavior, but it prevents the NULL dereference and the resulting oops while a more permanent solution is developed. Tested on a 8822CE chip which defines edcca_th, so this issue is not present on it, but it still uses this driver and I can verify there are no regressions.
References
Impacted products
Vendor Product Version
Linux Linux Version: fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130
Version: fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130
Version: fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130
Version: fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130
Version: fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/fw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a8cdb18ef80d67790d8611ba94ae3d81901c9e04",
              "status": "affected",
              "version": "fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130",
              "versionType": "git"
            },
            {
              "lessThan": "0b58a5ac9170a6f5e6425f8e1a4b3e1d9c2bf53d",
              "status": "affected",
              "version": "fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130",
              "versionType": "git"
            },
            {
              "lessThan": "6fa23cafaf30f4877e357f8eebcff00dff4aa9cb",
              "status": "affected",
              "version": "fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130",
              "versionType": "git"
            },
            {
              "lessThan": "1d1f250432cd8704c3c125168887f9724021c81a",
              "status": "affected",
              "version": "fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130",
              "versionType": "git"
            },
            {
              "lessThan": "d5e6f353ce1e1c25b8458ea390ed09d2377412c5",
              "status": "affected",
              "version": "fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/fw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "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": "6.1.189",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: Add NULL check for chip-\u003eedcca_th in rtw_fw_adaptivity_result()\n\nIt was recently reported that rtw_fw_adaptivity_result()\nin fw.c dereferences rtwdev-\u003echip-\u003eedcca_th without\na NULL check. The issue is that devices with the\n8821CE chip don\u0027t define edcca_th in their chip\ninfo. As a result, when rtw_fw_adaptivity_result()\ntries to dereference it, the kernel triggers an oops.\n\nAdd a NULL check for edcca_th before dereferencing\nit in rtw_fw_adaptivity_result() in fw.c. Placing\nthe check at the function entry avoids logging any\ngarbage values.\n\nThis change does not address the root cause for\nthis behavior, but it prevents the NULL dereference\nand the resulting oops while a more permanent solution\nis developed.\n\nTested on a 8822CE chip which defines edcca_th, so\nthis issue is not present on it, but it still uses\nthis driver and I can verify there are no regressions."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:59:10.452Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a8cdb18ef80d67790d8611ba94ae3d81901c9e04"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b58a5ac9170a6f5e6425f8e1a4b3e1d9c2bf53d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6fa23cafaf30f4877e357f8eebcff00dff4aa9cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/1d1f250432cd8704c3c125168887f9724021c81a"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5e6f353ce1e1c25b8458ea390ed09d2377412c5"
        }
      ],
      "title": "wifi: rtw88: Add NULL check for chip-\u003eedcca_th in rtw_fw_adaptivity_result()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97516",
    "datePublished": "2026-09-24T16:05:14.263Z",
    "dateReserved": "2026-09-24T16:01:01.152Z",
    "dateUpdated": "2026-10-03T10:59:10.452Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.