Vulnerability-Lookup

CVE-2026-64325 (GCVE-0-2026-64325)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-07-25 08:49

Title

wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon This patch is based on a BUG as reported by Bongani Hlope at https://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/ When a channel-switch announcement (CSA) beacon is received, cfg80211 queues a wiphy work item that eventually calls mt7921_channel_switch_rx_beacon(). If the station disconnects (or the channel context is otherwise torn down) between the time the work is queued and the time it runs, the driver's dev->new_ctx pointer can already have been cleared to NULL. mt7921_channel_switch_rx_beacon() then dereferences new_ctx unconditionally, triggering a NULL pointer dereference at address 0x0: BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common] The same missing guard exists in mt7925_channel_switch_rx_beacon(), which shares the same code pattern introduced by the same commit. Add an early-return NULL check for dev->new_ctx in both mt7921_channel_switch_rx_beacon() and mt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is no pending channel switch to process, so returning immediately is the correct and safe action. Oops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html

Severity

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/77e7b127472a191e0…
https://git.kernel.org/stable/c/351dd7d2c80d23e56…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8aa2f59260eb66fc80378c158922ccb741ccc491 , < 77e7b127472a191e086e1e0b1b051703f33b1801 (git) Affected: 8aa2f59260eb66fc80378c158922ccb741ccc491 , < 351dd7d2c80d23e56dcce6faa4e62bea5b0877c7 (git)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7921/main.c",
            "drivers/net/wireless/mediatek/mt76/mt7925/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "77e7b127472a191e086e1e0b1b051703f33b1801",
              "status": "affected",
              "version": "8aa2f59260eb66fc80378c158922ccb741ccc491",
              "versionType": "git"
            },
            {
              "lessThan": "351dd7d2c80d23e56dcce6faa4e62bea5b0877c7",
              "status": "affected",
              "version": "8aa2f59260eb66fc80378c158922ccb741ccc491",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7921/main.c",
            "drivers/net/wireless/mediatek/mt76/mt7925/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc1",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon\n\nThis patch is based on a BUG as reported by Bongani Hlope at\nhttps://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/\n\nWhen a channel-switch announcement (CSA) beacon is received,\ncfg80211 queues a wiphy work item that eventually calls\nmt7921_channel_switch_rx_beacon(). If the station disconnects\n(or the channel context is otherwise torn down) between the\ntime the work is queued and the time it runs, the driver\u0027s\ndev-\u003enew_ctx pointer can already have been cleared to NULL.\nmt7921_channel_switch_rx_beacon() then dereferences new_ctx\nunconditionally, triggering a NULL pointer dereference at\naddress 0x0:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]\n\nThe same missing guard exists in mt7925_channel_switch_rx_beacon(),\nwhich shares the same code pattern introduced by the same commit.\n\nAdd an early-return NULL check for dev-\u003enew_ctx in both\nmt7921_channel_switch_rx_beacon() and\nmt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is\nno pending channel switch to process, so returning immediately is\nthe correct and safe action.\n\nOops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:49:53.238Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801"
        },
        {
          "url": "https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7"
        }
      ],
      "title": "wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64325",
    "datePublished": "2026-07-25T08:49:53.238Z",
    "dateReserved": "2026-07-19T15:36:31.780Z",
    "dateUpdated": "2026-07-25T08:49:53.238Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64325",
      "date": "2026-07-26",
      "epss": "0.00189",
      "percentile": "0.08867"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64325\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:14.097\",\"lastModified\":\"2026-07-25T10:17:14.097\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon\\n\\nThis patch is based on a BUG as reported by Bongani Hlope at\\nhttps://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/\\n\\nWhen a channel-switch announcement (CSA) beacon is received,\\ncfg80211 queues a wiphy work item that eventually calls\\nmt7921_channel_switch_rx_beacon(). If the station disconnects\\n(or the channel context is otherwise torn down) between the\\ntime the work is queued and the time it runs, the driver\u0027s\\ndev-\u003enew_ctx pointer can already have been cleared to NULL.\\nmt7921_channel_switch_rx_beacon() then dereferences new_ctx\\nunconditionally, triggering a NULL pointer dereference at\\naddress 0x0:\\n\\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\\n  RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]\\n\\nThe same missing guard exists in mt7925_channel_switch_rx_beacon(),\\nwhich shares the same code pattern introduced by the same commit.\\n\\nAdd an early-return NULL check for dev-\u003enew_ctx in both\\nmt7921_channel_switch_rx_beacon() and\\nmt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is\\nno pending channel switch to process, so returning immediately is\\nthe correct and safe action.\\n\\nOops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt7921/main.c\",\"drivers/net/wireless/mediatek/mt76/mt7925/main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8aa2f59260eb66fc80378c158922ccb741ccc491\",\"lessThan\":\"77e7b127472a191e086e1e0b1b051703f33b1801\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa2f59260eb66fc80378c158922ccb741ccc491\",\"lessThan\":\"351dd7d2c80d23e56dcce6faa4e62bea5b0877c7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt7921/main.c\",\"drivers/net/wireless/mediatek/mt76/mt7925/main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:45:40Z",
      "cve": "CVE-2026-64325",
      "id": "CVE-2026-64325",
      "initial_release_date": "2026-07-25T16:45:40Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64325",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64325.json",
      "version": "2"
    }
  }
}

GHSA-6C49-XC7V-MQVW

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon

This patch is based on a BUG as reported by Bongani Hlope at https://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/

When a channel-switch announcement (CSA) beacon is received, cfg80211 queues a wiphy work item that eventually calls mt7921_channel_switch_rx_beacon(). If the station disconnects (or the channel context is otherwise torn down) between the time the work is queued and the time it runs, the driver's dev->new_ctx pointer can already have been cleared to NULL. mt7921_channel_switch_rx_beacon() then dereferences new_ctx unconditionally, triggering a NULL pointer dereference at address 0x0:

BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]

The same missing guard exists in mt7925_channel_switch_rx_beacon(), which shares the same code pattern introduced by the same commit.

Add an early-return NULL check for dev->new_ctx in both mt7921_channel_switch_rx_beacon() and mt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is no pending channel switch to process, so returning immediately is the correct and safe action.

Oops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64325"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon\n\nThis patch is based on a BUG as reported by Bongani Hlope at\nhttps://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/\n\nWhen a channel-switch announcement (CSA) beacon is received,\ncfg80211 queues a wiphy work item that eventually calls\nmt7921_channel_switch_rx_beacon(). If the station disconnects\n(or the channel context is otherwise torn down) between the\ntime the work is queued and the time it runs, the driver\u0027s\ndev-\u003enew_ctx pointer can already have been cleared to NULL.\nmt7921_channel_switch_rx_beacon() then dereferences new_ctx\nunconditionally, triggering a NULL pointer dereference at\naddress 0x0:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]\n\nThe same missing guard exists in mt7925_channel_switch_rx_beacon(),\nwhich shares the same code pattern introduced by the same commit.\n\nAdd an early-return NULL check for dev-\u003enew_ctx in both\nmt7921_channel_switch_rx_beacon() and\nmt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is\nno pending channel switch to process, so returning immediately is\nthe correct and safe action.\n\nOops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html",
  "id": "GHSA-6c49-xc7v-mqvw",
  "modified": "2026-07-25T12:31:31Z",
  "published": "2026-07-25T12:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64325"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-64325 (GCVE-0-2026-64325)

GHSA-6C49-XC7V-MQVW

Tags

Sightings

Nomenclature