{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8321424134a400a5e3eb39f9acca6bc6946ff447"
            },
            {
              "fixed": "6e327f14e1c43e175bf530f9165b2cadff308553"
            },
            {
              "fixed": "0c0b374e12d52af23ca741728db31091677cf9dc"
            },
            {
              "fixed": "42785f7e8d31540e6172bbcf08a7cc3cae1086f8"
            },
            {
              "fixed": "ed4f05d9f2f42fd866f55108db8123eefcc5fb33"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80943.json"
  },
  "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-\u003etids[]. 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-\u003etids[], 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]'.",
  "id": "CVE-2026-80943",
  "modified": "2026-09-15T03:30:55.543467985Z",
  "published": "2026-09-11T19:42:15.341Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids"
}