{"id":"CVE-2026-43176","state":"PUBLISHED","title":"wifi: rtw89: pci: validate release report content before using for RTL8922DE","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: validate release report content before using for RTL8922DE\n\nThe commit 957eda596c76\n(\"wifi: rtw89: pci: validate sequence number of TX release report\")\ndoes validation on existing chips, which somehow a release report of SKB\nbecomes malformed. As no clear cause found, add rules ahead for RTL8922DE\nto avoid crash if it happens.","publishedAt":"2026-05-06T11:27:50.150Z","updatedAt":"2026-10-19T19:16:22.766Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"ebeaa3b24ba568ff8505165f954dba15cc53e4b3","versionType":"git"},{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3","versionType":"git"},{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"5f93d611b33a05bd03d6843c8efe8cb6a1992620","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/pci.c"]}],"references":["https://git.kernel.org/stable/c/ebeaa3b24ba568ff8505165f954dba15cc53e4b3","https://git.kernel.org/stable/c/3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3","https://git.kernel.org/stable/c/5f93d611b33a05bd03d6843c8efe8cb6a1992620"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43176.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43176","state":"PUBLISHED","datePublished":"2026-05-06T11:27:50.150Z","dateUpdated":"2026-10-19T19:16:22.766Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.991Z"},"containers":{"cna":{"title":"wifi: rtw89: pci: validate release report content before using for RTL8922DE","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: validate release report content before using for RTL8922DE\n\nThe commit 957eda596c76\n(\"wifi: rtw89: pci: validate sequence number of TX release report\")\ndoes validation on existing chips, which somehow a release report of SKB\nbecomes malformed. As no clear cause found, add rules ahead for RTL8922DE\nto avoid crash if it happens."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"ebeaa3b24ba568ff8505165f954dba15cc53e4b3","versionType":"git"},{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3","versionType":"git"},{"version":"110f3c11f440d78ef8a181f75456e24e428f69e4","status":"affected","lessThan":"5f93d611b33a05bd03d6843c8efe8cb6a1992620","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/pci.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ebeaa3b24ba568ff8505165f954dba15cc53e4b3"},{"url":"https://git.kernel.org/stable/c/3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3"},{"url":"https://git.kernel.org/stable/c/5f93d611b33a05bd03d6843c8efe8cb6a1992620"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The vulnerable path is in a PCI WiFi driver’s TX release-report handling, reached from device/firmware reports generated during wireless operation. A plausible attacker is an adjacent WiFi peer/AP/injector that can induce wireless traffic and repeated TX completions on affected RTL8922DE systems.\nAC:L - No race or special software privilege gate is required once the affected device is operating; the vulnerable report parser is reached through normal IRQ/NAPI processing. Although malformed reports are hardware/firmware-originated, repeated induced traffic makes low complexity the higher-severity defensible choice.\nPR:N - The path is entered from hardware interrupt/NAPI processing, not from an ioctl or privileged local API. An adjacent attacker does not need Linux credentials or kernel capabilities on the victim.\nUI:N - After the affected WiFi device is active, processing release reports requires no victim action at exploit time. The interrupt-driven reclaim path runs automatically.\nS:U - The impact is within the same host kernel/driver security authority. There is no VM escape, IOMMU bypass, or separate security scope crossed.\nC:H - The invalid TX channel can index outside or into unallocated `rtwpci->tx.rings` entries before list/SKB operations, creating kernel memory corruption potential beyond a pure NULL dereference. Under the required uncertainty rule, this is scored as high confidentiality impact.\nI:H - The same unvalidated channel selection can drive list manipulation and cleanup on an invalid/uninitialized TX ring, which is memory corruption with potential control-flow or data integrity impact. Under the required uncertainty rule, this is scored as high integrity impact.\nA:H - The related release-report bug is documented to cause a kernel NULL pointer dereference/oops in this reclaim path, and this fix explicitly prevents crashes from malformed reports. A remotely induced kernel crash is high availability impact."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:26:18.965Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-43176","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:15:20.006186Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","type":"CWE","description":"CWE-20 Improper Input Validation"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:16:22.766Z"}}]}}}