Vulnerability-Lookup

GHSA-8F9M-RJ4X-3W9P

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-13 09:32

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids

rtl92du_tx_fill_desc() uses ieee80211_get_tid() to read the QoS TID from the 802.11 header and then uses it as an index into sta_entry->tids[]. ieee80211_get_tid() returns the low 4-bit QoS TID value, so the result can be in the range 0..15.

rtlwifi only allocates MAX_TID_COUNT entries for sta_entry->tids[], and MAX_TID_COUNT is 9. A QoS TID greater than 8 therefore indexes past the aggregation state array. Keep the default RTL_AGG_STOP state for out-of-range TIDs, matching rtl92cu_tx_fill_desc().

This issue was detected by our static analysis tool and confirmed by manual audit. UBSAN validation for the same bug pattern reports an array-index-out-of-bounds access with index 10 for type 'rtl_tid_data [9]'.

Severity

7.6 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80943"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:18:59Z",
    "severity": "HIGH"
  },
  "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\u0027rtl_tid_data [9]\u0027.",
  "id": "GHSA-8f9m-rj4x-3w9p",
  "modified": "2026-09-13T09:32:09Z",
  "published": "2026-09-11T21:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80943"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80943 (GCVE-0-2026-80943)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:42 – Updated: 2026-09-13 06:28

Title

wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids rtl92du_tx_fill_desc() uses ieee80211_get_tid() to read the QoS TID from the 802.11 header and then uses it as an index into sta_entry->tids[]. ieee80211_get_tid() returns the low 4-bit QoS TID value, so the result can be in the range 0..15. rtlwifi only allocates MAX_TID_COUNT entries for sta_entry->tids[], and MAX_TID_COUNT is 9. A QoS TID greater than 8 therefore indexes past the aggregation state array. Keep the default RTL_AGG_STOP state for out-of-range TIDs, matching rtl92cu_tx_fill_desc(). This issue was detected by our static analysis tool and confirmed by manual audit. UBSAN validation for the same bug pattern reports an array-index-out-of-bounds access with index 10 for type 'rtl_tid_data [9]'.

Severity

7.6 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/6e327f14e1c43e175…
https://git.kernel.org/stable/c/0c0b374e12d52af23…
https://git.kernel.org/stable/c/42785f7e8d31540e6…
https://git.kernel.org/stable/c/ed4f05d9f2f42fd86…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8321424134a400a5e3eb39f9acca6bc6946ff447 , < 6e327f14e1c43e175bf530f9165b2cadff308553 (git) Affected: 8321424134a400a5e3eb39f9acca6bc6946ff447 , < 0c0b374e12d52af23ca741728db31091677cf9dc (git) Affected: 8321424134a400a5e3eb39f9acca6bc6946ff447 , < 42785f7e8d31540e6172bbcf08a7cc3cae1086f8 (git) Affected: 8321424134a400a5e3eb39f9acca6bc6946ff447 , < ed4f05d9f2f42fd866f55108db8123eefcc5fb33 (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6e327f14e1c43e175bf530f9165b2cadff308553",
              "status": "affected",
              "version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
              "versionType": "git"
            },
            {
              "lessThan": "0c0b374e12d52af23ca741728db31091677cf9dc",
              "status": "affected",
              "version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
              "versionType": "git"
            },
            {
              "lessThan": "42785f7e8d31540e6172bbcf08a7cc3cae1086f8",
              "status": "affected",
              "version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
              "versionType": "git"
            },
            {
              "lessThan": "ed4f05d9f2f42fd866f55108db8123eefcc5fb33",
              "status": "affected",
              "version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
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        {
          "lang": "en",
          "value": "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\u0027rtl_tid_data [9]\u0027."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - An adjacent Wi-Fi peer can trigger automatic open-mesh peering responses; ieee80211_get_tid() treats the self-protected action category 15 as a QoS TID, so rtl92du_tx_fill_desc() is reached over the wireless link.\nAC:L - A valid peering-open frame deterministically allocates an authorized station and transmits a category-15 action frame into the vulnerable TX descriptor path; no race or other condition outside the attacker\u0027s control is required.\nPR:N - Open 802.11s mesh accepts self-protected peering frames from unknown peers and automatically inserts an authorized station, so no credentials or local capabilities are required.\nUI:N - Once the rtl8192du interface is operating as a mesh point, mac80211 processes the attacker\u0027s frame and transmits the peering response without further victim action.\nS:U - The out-of-bounds access and any resulting crash remain in the host kernel and wireless device security authority, without crossing a VM, IOMMU, or sandbox boundary.\nC:L - The bug reads one agg_state byte at a TID-selected offset; TIDs 9-15 index past tids[9] into adjacent heap, yielding only a tightly bounded heap-state oracle rather than arbitrary disclosure.\nI:L - The access does not overwrite kernel memory or provide an arbitrary-write primitive; the fetched byte can only influence AMPDU/RTS TX descriptor fields, giving limited transmission integrity impact.\nA:H - UBSAN trap or panic-on-warning kernels can oops or panic on the deterministic bounds violation, and an adjacent peer can retrigger it after recovery."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T06:28:18.870Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/6e327f14e1c43e175bf530f9165b2cadff308553"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c0b374e12d52af23ca741728db31091677cf9dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/42785f7e8d31540e6172bbcf08a7cc3cae1086f8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed4f05d9f2f42fd866f55108db8123eefcc5fb33"
        }
      ],
      "title": "wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80943",
    "datePublished": "2026-09-11T19:42:15.341Z",
    "dateReserved": "2026-08-26T14:34:25.803Z",
    "dateUpdated": "2026-09-13T06:28:18.870Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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