{"id":"CVE-2026-80943","revision":"51e113c10b554787b59b620e8afce6ce","records":[{"revision":"51e113c10b554787b59b620e8afce6ce","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80943","aliases":[],"title":"wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtlwifi: rtl8192du: check QoS TID before indexing tids\n\nrtl92du_tx_fill_desc() uses ieee80211_get_tid() to read the QoS TID\nfrom the 802.11 header and then uses it as an index into\nsta_entry->tids[]. ieee80211_get_tid() returns the low 4-bit QoS TID\nvalue, so the result can be in the range 0..15.\n\nrtlwifi only allocates MAX_TID_COUNT entries for sta_entry->tids[], and\nMAX_TID_COUNT is 9. A QoS TID greater than 8 therefore indexes past the\naggregation state array. Keep the default RTL_AGG_STOP state for\nout-of-range TIDs, matching rtl92cu_tx_fill_desc().\n\nThis issue was detected by our static analysis tool and confirmed by\nmanual audit. UBSAN validation for the same bug pattern reports an\narray-index-out-of-bounds access with index 10 for type\n'rtl_tid_data [9]'.","state":0,"publishedAt":"2026-09-11T19:42:15.341+00:00","modifiedAt":"2026-10-19T08:45:27.392+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8321424134a400a5e3eb39f9acca6bc6946ff447\",\n                            \"lessThan\": \"6e327f14e1c43e175bf530f9165b2cadff308553\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8321424134a400a5e3eb39f9acca6bc6946ff447\",\n                            \"lessThan\": \"0c0b374e12d52af23ca741728db31091677cf9dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8321424134a400a5e3eb39f9acca6bc6946ff447\",\n                            \"lessThan\": \"42785f7e8d31540e6172bbcf08a7cc3cae1086f8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8321424134a400a5e3eb39f9acca6bc6946ff447\",\n                            \"lessThan\": \"ed4f05d9f2f42fd866f55108db8123eefcc5fb33\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","score":7.6,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/6e327f14e1c43e175bf530f9165b2cadff308553","https://git.kernel.org/stable/c/0c0b374e12d52af23ca741728db31091677cf9dc","https://git.kernel.org/stable/c/42785f7e8d31540e6172bbcf08a7cc3cae1086f8","https://git.kernel.org/stable/c/ed4f05d9f2f42fd866f55108db8123eefcc5fb33"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80943","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80943","identifiers":["CVE-2026-80943"]},"retained":false,"historicalAffected":[]}],"coverage":[]}