Vulnerability-Lookup

GHSA-998C-5H7Q-5RRG

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53102"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:24Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-998c-5h7q-5rrg",
  "modified": "2026-06-24T18:32:47Z",
  "published": "2026-06-24T18:32:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53102"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30

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

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/eb466406d2094deef…
https://git.kernel.org/stable/c/c41075ce8cf05ed8c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6683d988089ce0e80bd859a9493333b6b272420e , < eb466406d2094deefadc2cd6ddb4f6eeb086d1b4 (git) Affected: 6683d988089ce0e80bd859a9493333b6b272420e , < c41075ce8cf05ed8c0e7b7efef000dce548ffc42 (git)
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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JSON

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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": [
            {
              "lessThan": "eb466406d2094deefadc2cd6ddb4f6eeb086d1b4",
              "status": "affected",
              "version": "6683d988089ce0e80bd859a9493333b6b272420e",
              "versionType": "git"
            },
            {
              "lessThan": "c41075ce8cf05ed8c0e7b7efef000dce548ffc42",
              "status": "affected",
              "version": "6683d988089ce0e80bd859a9493333b6b272420e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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": [
            {
              "status": "affected",
              "version": "5.18"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "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"
      },
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          "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": {
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    }
  },
  "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"
}

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.

Action not permitted

GHSA-998C-5H7Q-5RRG

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

Tags

Sightings

Nomenclature