Vulnerability-Lookup

FKIE_CVE-2026-23444

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-07-24 21:10

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure ieee80211_tx_prepare_skb() has three error paths, but only two of them free the skb. The first error path (ieee80211_tx_prepare() returning TX_DROP) does not free it, while invoke_tx_handlers() failure and the fragmentation check both do. Add kfree_skb() to the first error path so all three are consistent, and remove the now-redundant frees in callers (ath9k, mt76, mac80211_hwsim) to avoid double-free. Document the skb ownership guarantee in the function's kdoc.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	3.13
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/channel.c",
            "drivers/net/wireless/mediatek/mt76/scan.c",
            "drivers/net/wireless/virtual/mac80211_hwsim.c",
            "include/net/mac80211.h",
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "905ef207d5ed99ca64adfe39fba9ac46e434327a",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "5ef8ca1c164786da24169af155c1ca1ff1353cf8",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "9a779d1f480e83720b5384adf165604e7ee226bd",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "3b4d27acafaeab478fd24f79ad6e593a892828b9",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "06e769dddcbeb3baf2ce346273b53dd61fdbecf4",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "50f1b690b4868923fbd242298def2fb88662f108",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "d5ad6ab61cbd89afdb60881f6274f74328af3ee9",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/channel.c",
            "drivers/net/wireless/mediatek/mt76/scan.c",
            "drivers/net/wireless/virtual/mac80211_hwsim.c",
            "include/net/mac80211.h",
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.84",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FF3A2276-F204-45D0-888F-78B1900D361C",
              "versionEndExcluding": "6.18.20",
              "versionStartIncluding": "3.13.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "96D34333-38BE-4414-9E79-6EB764329581",
              "versionEndExcluding": "6.19.10",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:3.13:-:*:*:*:*:*:*",
              "matchCriteriaId": "0F72A71E-B6B2-40F2-A21D-BF7CE1514976",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure\n\nieee80211_tx_prepare_skb() has three error paths, but only two of them\nfree the skb. The first error path (ieee80211_tx_prepare() returning\nTX_DROP) does not free it, while invoke_tx_handlers() failure and the\nfragmentation check both do.\n\nAdd kfree_skb() to the first error path so all three are consistent,\nand remove the now-redundant frees in callers (ath9k, mt76,\nmac80211_hwsim) to avoid double-free.\n\nDocument the skb ownership guarantee in the function\u0027s kdoc."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: mac80211: liberar siempre skb en caso de fallo de ieee80211_tx_prepare_skb()\n\nieee80211_tx_prepare_skb() tiene tres rutas de error, pero solo dos de ellas liberan el skb. La primera ruta de error (ieee80211_tx_prepare() devolviendo TX_DROP) no lo libera, mientras que el fallo de invoke_tx_handlers() y la comprobaci\u00f3n de fragmentaci\u00f3n s\u00ed lo hacen.\n\nA\u00f1adir kfree_skb() a la primera ruta de error para que las tres sean consistentes, y eliminar las liberaciones ahora redundantes en las funciones que llaman (ath9k, mt76, mac80211_hwsim) para evitar la doble liberaci\u00f3n.\n\nDocumentar la garant\u00eda de propiedad del skb en el kdoc de la funci\u00f3n."
    }
  ],
  "id": "CVE-2026-23444",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-03T16:16:28.810",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-23444 (GCVE-0-2026-23444)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-08-05 12:21

Title

wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/905ef207d5ed99ca6…
https://git.kernel.org/stable/c/5ef8ca1c164786da2…
https://git.kernel.org/stable/c/9a779d1f480e83720…
https://git.kernel.org/stable/c/f77b51bcee7be2bb6…
https://git.kernel.org/stable/c/3b4d27acafaeab478…
https://git.kernel.org/stable/c/06e769dddcbeb3baf…
https://git.kernel.org/stable/c/50f1b690b4868923f…
https://git.kernel.org/stable/c/d5ad6ab61cbd89afd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 905ef207d5ed99ca64adfe39fba9ac46e434327a (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 5ef8ca1c164786da24169af155c1ca1ff1353cf8 (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 9a779d1f480e83720b5384adf165604e7ee226bd (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4 (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 3b4d27acafaeab478fd24f79ad6e593a892828b9 (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 06e769dddcbeb3baf2ce346273b53dd61fdbecf4 (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < 50f1b690b4868923fbd242298def2fb88662f108 (git) Affected: 06be6b149f7e406bcf16098567f5a6c9f042bced , < d5ad6ab61cbd89afdb60881f6274f74328af3ee9 (git)
Linux	Linux	Affected: 3.13 Unaffected: 0 , < 3.13 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.84 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/channel.c",
            "drivers/net/wireless/mediatek/mt76/scan.c",
            "drivers/net/wireless/virtual/mac80211_hwsim.c",
            "include/net/mac80211.h",
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "905ef207d5ed99ca64adfe39fba9ac46e434327a",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "5ef8ca1c164786da24169af155c1ca1ff1353cf8",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "9a779d1f480e83720b5384adf165604e7ee226bd",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "3b4d27acafaeab478fd24f79ad6e593a892828b9",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "06e769dddcbeb3baf2ce346273b53dd61fdbecf4",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "50f1b690b4868923fbd242298def2fb88662f108",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            },
            {
              "lessThan": "d5ad6ab61cbd89afdb60881f6274f74328af3ee9",
              "status": "affected",
              "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath9k/channel.c",
            "drivers/net/wireless/mediatek/mt76/scan.c",
            "drivers/net/wireless/virtual/mac80211_hwsim.c",
            "include/net/mac80211.h",
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.84",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.136",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.84",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.10",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure\n\nieee80211_tx_prepare_skb() has three error paths, but only two of them\nfree the skb. The first error path (ieee80211_tx_prepare() returning\nTX_DROP) does not free it, while invoke_tx_handlers() failure and the\nfragmentation check both do.\n\nAdd kfree_skb() to the first error path so all three are consistent,\nand remove the now-redundant frees in callers (ath9k, mt76,\nmac80211_hwsim) to avoid double-free.\n\nDocument the skb ownership guarantee in the function\u0027s kdoc."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable mac80211 helper is reached from local nl80211 operations such as setting wireless parameters and triggering hardware scans, not from received WiFi frames. A local attacker can drive affected scan paths through the kernel\u0027s generic netlink API.\nAC:L - The failure path can be triggered deterministically on an affected device by choosing scan parameters that produce a directed, oversized probe request with a low fragmentation threshold. No race or condition outside the attacker\u0027s control is required once the affected driver/path is available.\nPR:L - The reachable nl80211 commands are guarded by GENL_UNS_ADMIN_PERM/CAP_NET_ADMIN in the relevant network namespace, which is low privilege for CVSS purposes and can be reachable through user namespaces in plausible deployments. It does not require full init-namespace root.\nUI:N - After obtaining the needed local privileges, the attacker can issue the netlink operations directly. No separate victim action is required.\nS:U - The bug corrupts kernel networking memory within the same kernel security authority. It does not cross a VM, hypervisor, or separate security-scope boundary.\nC:H - The vulnerable failure path creates a double-free/use-after-free of an sk_buff, which is kernel heap memory corruption. Such corruption can plausibly be exploited for kernel memory disclosure, so confidentiality impact is high.\nI:H - The double-free/use-after-free can plausibly be turned into kernel heap manipulation and control-flow or data corruption. Under the required overestimate rule, this supports high integrity impact.\nA:H - Even without full exploitation, the double-free/use-after-free can trigger slab corruption, warnings, oopses, or kernel panic. Availability impact is therefore high."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:21:47.685Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9"
        },
        {
          "url": "https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4"
        },
        {
          "url": "https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9"
        }
      ],
      "title": "wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23444",
    "datePublished": "2026-04-03T15:15:28.464Z",
    "dateReserved": "2026-01-13T15:37:46.019Z",
    "dateUpdated": "2026-08-05T12:21:47.685Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2026-23444

CVE-2026-23444 (GCVE-0-2026-23444)

Tags

Sightings

Nomenclature

Related by attack behaviour