{"id":"CVE-2026-80943","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-80943","summary":"wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids","details":"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]'.","published":"2026-09-11T19:42:15.341Z","modified":"2026-09-14T03:45:51.194997292Z","cvss":{"score":7.6,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.109"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c0b374e12d52af23ca741728db31091677cf9dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/42785f7e8d31540e6172bbcf08a7cc3cae1086f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e327f14e1c43e175bf530f9165b2cadff308553"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed4f05d9f2f42fd866f55108db8123eefcc5fb33"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80943.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80943"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:45:51.194997292Z"}}