CVE-2026-53102 (GCVE-0-2026-53102)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req() mt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to be freed eventually by mt76_mcu_skb_send_msg(). However, currently if an intermediate function fails before sending, the allocated skb is leaked. Specifically, mt76_connac_mcu_sta_wed_update() and mt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory leak in the error path. Fix this by explicitly freeing the skb in these error paths. Commit 7c0f63fe37a5 ("wifi: mt76: mt7996: fix memory leak on mt7996_mcu_sta_key_tlv error") made a similar change. Compile tested only. Issue found using a prototype static analysis tool and code review.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6683d988089ce0e80bd859a9493333b6b272420e , < eb466406d2094deefadc2cd6ddb4f6eeb086d1b4 (git)
Affected: 6683d988089ce0e80bd859a9493333b6b272420e , < c41075ce8cf05ed8c0e7b7efef000dce548ffc42 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c",
            "drivers/net/wireless/mediatek/mt76/mt7915/mcu.c",
            "drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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            "drivers/net/wireless/mediatek/mt76/mt7915/mcu.c",
            "drivers/net/wireless/mediatek/mt76/mt7925/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.18"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()\n\nmt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to\nbe freed eventually by mt76_mcu_skb_send_msg(). However, currently if\nan intermediate function fails before sending, the allocated skb is\nleaked.\n\nSpecifically, mt76_connac_mcu_sta_wed_update() and\nmt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory\nleak in the error path.\n\nFix this by explicitly freeing the skb in these error paths.\nCommit 7c0f63fe37a5 (\"wifi: mt76: mt7996: fix memory leak on\nmt7996_mcu_sta_key_tlv error\") made a similar change.\n\nCompile tested only. Issue found using a prototype static analysis tool\nand code review."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:38.536Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42"
        }
      ],
      "title": "wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53102",
    "datePublished": "2026-06-24T16:30:38.536Z",
    "dateReserved": "2026-06-09T07:44:35.384Z",
    "dateUpdated": "2026-06-24T16:30:38.536Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53102",
      "date": "2026-07-16",
      "epss": "0.00156",
      "percentile": "0.05162"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-12T15:01:13.000Z",
      "cve": "CVE-2026-53102",
      "id": "msrc_CVE-2026-53102",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53102.json",
      "version": "3"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53102\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:24.473\",\"lastModified\":\"2026-07-14T15:26:52.267\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()\\n\\nmt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to\\nbe freed eventually by mt76_mcu_skb_send_msg(). However, currently if\\nan intermediate function fails before sending, the allocated skb is\\nleaked.\\n\\nSpecifically, mt76_connac_mcu_sta_wed_update() and\\nmt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory\\nleak in the error path.\\n\\nFix this by explicitly freeing the skb in these error paths.\\nCommit 7c0f63fe37a5 (\\\"wifi: mt76: mt7996: fix memory leak on\\nmt7996_mcu_sta_key_tlv error\\\") made a similar change.\\n\\nCompile tested only. Issue found using a prototype static analysis tool\\nand code review.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c\",\"drivers/net/wireless/mediatek/mt76/mt7915/mcu.c\",\"drivers/net/wireless/mediatek/mt76/mt7925/mcu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6683d988089ce0e80bd859a9493333b6b272420e\",\"lessThan\":\"eb466406d2094deefadc2cd6ddb4f6eeb086d1b4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6683d988089ce0e80bd859a9493333b6b272420e\",\"lessThan\":\"c41075ce8cf05ed8c0e7b7efef000dce548ffc42\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c\",\"drivers/net/wireless/mediatek/mt76/mt7915/mcu.c\",\"drivers/net/wireless/mediatek/mt76/mt7925/mcu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:44:26+00:00",
      "cve": "CVE-2026-53102",
      "id": "CVE-2026-53102",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53102.json",
      "version": "3"
    }
  }
}



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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.

Sightings

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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.


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