{"api_version":"1","generated_at":"2026-09-24T23:02:14+00:00","cve":"CVE-2026-97516","urls":{"html":"https://cve.report/CVE-2026-97516","api":"https://cve.report/api/cve/CVE-2026-97516.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97516","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97516"},"summary":{"title":"wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()\n\nIt was recently reported that rtw_fw_adaptivity_result()\nin fw.c dereferences rtwdev->chip->edcca_th without\na NULL check. The issue is that devices with the\n8821CE chip don't 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:29","updated_at":"2026-09-24 17:17:29"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6fa23cafaf30f4877e357f8eebcff00dff4aa9cb","name":"https://git.kernel.org/stable/c/6fa23cafaf30f4877e357f8eebcff00dff4aa9cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d5e6f353ce1e1c25b8458ea390ed09d2377412c5","name":"https://git.kernel.org/stable/c/d5e6f353ce1e1c25b8458ea390ed09d2377412c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d1f250432cd8704c3c125168887f9724021c81a","name":"https://git.kernel.org/stable/c/1d1f250432cd8704c3c125168887f9724021c81a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97516","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97516","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6fa23cafaf30f4877e357f8eebcff00dff4aa9cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 1d1f250432cd8704c3c125168887f9724021c81a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d5e6f353ce1e1c25b8458ea390ed09d2377412c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.111 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.53 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"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":"6fa23cafaf30f4877e357f8eebcff00dff4aa9cb","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"1d1f250432cd8704c3c125168887f9724021c81a","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d5e6f353ce1e1c25b8458ea390ed09d2377412c5","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.12.111","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.53","status":"affected","version":"0","versionType":"semver"}]},{"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":[{"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":"6.12.111","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","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->edcca_th in rtw_fw_adaptivity_result()\n\nIt was recently reported that rtw_fw_adaptivity_result()\nin fw.c dereferences rtwdev->chip->edcca_th without\na NULL check. The issue is that devices with the\n8821CE chip don't 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":"2026-09-24T16:05:14.263Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"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->edcca_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":"2026-09-24T16:05:14.263Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:29","lastModifiedDate":"2026-09-24 17:17:29","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97516","Ordinal":"1","Title":"wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptiv","CVE":"CVE-2026-97516","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97516","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()\n\nIt was recently reported that rtw_fw_adaptivity_result()\nin fw.c dereferences rtwdev->chip->edcca_th without\na NULL check. The issue is that devices with the\n8821CE chip don't 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.","Type":"Description","Title":"wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptiv"}]}}}