CVE-2026-93807 (GCVE-0-2026-93807)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:02 – Updated: 2026-09-25 12:43
VLAI
Title
wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and data[24] whenever key data is present. Those offsets are only part of the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as CCMP, do not provide those bytes, so the unconditional copies can read past the supplied key buffer. Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are shorter than the expected 32-byte layout. [drop useless length check]
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dad0d04fa7ba41ce603a01e8e64967650303e9a2 , < 5902e3c08c63d65724772f74d65b9fb032625dca (git)
Affected: dad0d04fa7ba41ce603a01e8e64967650303e9a2 , < 55b86ef6c2e68879ffd95203b011ef42a013ab88 (git)
Affected: dad0d04fa7ba41ce603a01e8e64967650303e9a2 , < 843fe9bc583b7686ca68312ac9319c9240a73c03 (git)
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Linux Linux Affected: 3.15
Unaffected: 0 , < 3.15 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/rsi/rsi_91x_mgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
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          "vendor": "Linux",
          "versions": [
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              "version": "3.15"
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              "version": "0",
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              "versionType": "semver"
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers\n\nrsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and\ndata[24] whenever key data is present. Those offsets are only part of\nthe 32-byte TKIP key layout. Shorter keys used by other ciphers, such as\nCCMP, do not provide those bytes, so the unconditional copies can read\npast the supplied key buffer.\n\nOnly copy the MIC keys for TKIP, and reject malformed TKIP keys that are\nshorter than the expected 32-byte layout.\n\n[drop useless length check]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T12:43:15.039Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5902e3c08c63d65724772f74d65b9fb032625dca"
        },
        {
          "url": "https://git.kernel.org/stable/c/55b86ef6c2e68879ffd95203b011ef42a013ab88"
        },
        {
          "url": "https://git.kernel.org/stable/c/843fe9bc583b7686ca68312ac9319c9240a73c03"
        }
      ],
      "title": "wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93807",
    "datePublished": "2026-09-24T16:02:41.356Z",
    "dateReserved": "2026-09-18T17:59:28.790Z",
    "dateUpdated": "2026-09-25T12:43:15.039Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "date": "2026-09-27",
      "epss": "0.00166",
      "percentile": "0.05217"
    },
    "nvd": {
      "cve": {
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          {
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                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/rsi/rsi_91x_mgmt.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                ],
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                    "versionType": "semver"
                  },
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                    "version": "6.18.53",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
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                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers\n\nrsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and\ndata[24] whenever key data is present. Those offsets are only part of\nthe 32-byte TKIP key layout. Shorter keys used by other ciphers, such as\nCCMP, do not provide those bytes, so the unconditional copies can read\npast the supplied key buffer.\n\nOnly copy the MIC keys for TKIP, and reject malformed TKIP keys that are\nshorter than the expected 32-byte layout.\n\n[drop useless length check]"
          }
        ],
        "id": "CVE-2026-93807",
        "lastModified": "2026-09-25T13:17:21.577",
        "metrics": {},
        "published": "2026-09-24T17:17:13.683",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
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          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:47:25Z",
      "cve": "CVE-2026-93807",
      "id": "CVE-2026-93807",
      "initial_release_date": "2026-09-24T23:47:25Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93807",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93807.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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