Vulnerability-Lookup

CVE-2025-71100 (GCVE-0-2025-71100)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:34 – Updated: 2026-08-05 12:12

Title

wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc() TID getting from ieee80211_get_tid() might be out of range of array size of sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise, UBSAN warn: UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30 index 10 is out of range 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

3 references

URL	Tags
https://git.kernel.org/stable/c/9765d6eb8298b07d4…
https://git.kernel.org/stable/c/90a15ff324645aa80…
https://git.kernel.org/stable/c/dd39edb445f07400e…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8ca4cdef93297c9b9bf08da39bc940bd20acbb94 , < 9765d6eb8298b07d499cdf9ef7c237d3540102d6 (git) Affected: 8ca4cdef93297c9b9bf08da39bc940bd20acbb94 , < 90a15ff324645aa806d81fa349497cd964861b66 (git) Affected: 8ca4cdef93297c9b9bf08da39bc940bd20acbb94 , < dd39edb445f07400e748da967a07d5dca5c5f96e (git)	guessed
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.12.64 , ≤ 6.12.* (semver) Unaffected: 6.18.4 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9765d6eb8298b07d499cdf9ef7c237d3540102d6",
              "status": "affected",
              "version": "8ca4cdef93297c9b9bf08da39bc940bd20acbb94",
              "versionType": "git"
            },
            {
              "lessThan": "90a15ff324645aa806d81fa349497cd964861b66",
              "status": "affected",
              "version": "8ca4cdef93297c9b9bf08da39bc940bd20acbb94",
              "versionType": "git"
            },
            {
              "lessThan": "dd39edb445f07400e748da967a07d5dca5c5f96e",
              "status": "affected",
              "version": "8ca4cdef93297c9b9bf08da39bc940bd20acbb94",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()\n\nTID getting from ieee80211_get_tid() might be out of range of array size\nof sta_entry-\u003etids[], so check TID is less than MAX_TID_COUNT. Othwerwise,\nUBSAN warn:\n\n UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30\n index 10 is out of range for type \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 whose category 15 is misinterpreted as a TID, reaching rtl92cu_tx_fill_desc() over the wireless link.\nAC:L - A valid peering-open frame deterministically triggers the vulnerable transmit path; no race or condition outside the attacker\u0027s control is required.\nPR:N - The open-mesh path accepts self-protected peering frames from unknown peers and automatically creates an authorized station entry, requiring no credentials or local capabilities.\nUI:N - Once the affected wireless interface is operating, mac80211 processes the attacker\u0027s frame and transmits the vulnerable response automatically.\nS:U - The access and resulting effects remain within the host kernel and wireless device security authority, without crossing a virtualization or isolation boundary.\nC:L - The access reads one byte at one of a small number of TID-selected offsets, with TIDs 10 through 15 reaching beyond the tail-allocated driver data; conservatively, this permits only a tightly bounded heap-state oracle rather than arbitrary memory disclosure.\nI:L - The operation cannot overwrite kernel memory or provide an arbitrary-write primitive, but the fetched byte can influence aggregation and RTS descriptor state, supporting 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": "2026-08-05T12:12:05.756Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9765d6eb8298b07d499cdf9ef7c237d3540102d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/90a15ff324645aa806d81fa349497cd964861b66"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd39edb445f07400e748da967a07d5dca5c5f96e"
        }
      ],
      "title": "wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71100",
    "datePublished": "2026-01-13T15:34:59.039Z",
    "dateReserved": "2026-01-13T15:30:19.651Z",
    "dateUpdated": "2026-08-05T12:12:05.756Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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    "epss": {
      "cve": "CVE-2025-71100",
      "date": "2026-09-14",
      "epss": "0.00189",
      "percentile": "0.08619"
    },
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Othwerwise,\\nUBSAN warn:\\n\\n UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30\\n index 10 is out of range for type \u0027rtl_tid_data [9]\u0027\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\\n\\nwifi: rtlwifi: 8192cu: soluci\u00f3n a tid fuera de rango en rtl92cu_tx_fill_desc()\\n\\nEl TID obtenido de ieee80211_get_tid() podr\u00eda estar fuera del rango del tama\u00f1o del array de sta_entry-\u0026gt;tids[], por lo tanto, se verifica que el TID sea menor que MAX_TID_COUNT. De lo contrario, UBSAN advierte:\\n\\n UBSAN: \u00edndice de array fuera de l\u00edmites en drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30\\n el \u00edndice 10 est\u00e1 fuera de rango para el tipo \u0027rtl_tid_data [9]\u0027\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8ca4cdef93297c9b9bf08da39bc940bd20acbb94\",\"lessThan\":\"9765d6eb8298b07d499cdf9ef7c237d3540102d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8ca4cdef93297c9b9bf08da39bc940bd20acbb94\",\"lessThan\":\"90a15ff324645aa806d81fa349497cd964861b66\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8ca4cdef93297c9b9bf08da39bc940bd20acbb94\",\"lessThan\":\"dd39edb445f07400e748da967a07d5dca5c5f96e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.4\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H\",\"baseScore\":7.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.7},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-129\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.9.1\",\"versionEndExcluding\":\"6.12.64\",\"matchCriteriaId\":\"52C1C110-A682-476D-87D1-E448C00825CA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.4\",\"matchCriteriaId\":\"DC988EA0-0E32-457A-BF95-89BEB31A227B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"3F2A4A3D-068A-4CF2-A09F-9C7937DDB0A5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/90a15ff324645aa806d81fa349497cd964861b66\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9765d6eb8298b07d499cdf9ef7c237d3540102d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dd39edb445f07400e748da967a07d5dca5c5f96e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T08:32:49+00:00",
      "cve": "CVE-2025-71100",
      "id": "CVE-2025-71100",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71100.json",
      "version": "3"
    }
  }
}

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.

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CVE-2025-71100 (GCVE-0-2025-71100)

Tags

Sightings

Nomenclature