Vulnerability-Lookup

FKIE_CVE-2024-26739

Vulnerability from fkie_nvd - Published: 2024-04-03 17:15 - Updated: 2026-08-04 11:17

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: don't override retval if we already lost the skb If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
debian	debian_linux	11.0
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "e873e8f7d03a2ee5b77fb1a305c782fed98e2754",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "f4e294bbdca8ac8757db436fc82214f3882fc7e7",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.182",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C7881168-C074-4F6E-8DDE-02BD994C2EF1",
              "versionEndExcluding": "5.10.238",
              "versionStartIncluding": "4.19",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "57E76AE8-79D9-4EC8-9845-9A86B1ED152E",
              "versionEndExcluding": "5.15.182",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "27735C1B-DDFC-4860-8952-1D01025F9D4C",
              "versionEndExcluding": "6.1.136",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8D82004C-B2AE-4048-9344-32EFF65953B0",
              "versionEndExcluding": "6.6.19",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "575EE16B-67F2-4B5B-B5F8-1877715C898B",
              "versionEndExcluding": "6.7.7",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F02056A5-B362-4370-9FF8-6F0BD384D520",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "62075ACE-B2A0-4B16-829D-B3DA5AE5CC41",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_mirred: don\u0027t override retval if we already lost the skb\n\nIf we\u0027re redirecting the skb, and haven\u0027t called tcf_mirred_forward(),\nyet, we need to tell the core to drop the skb by setting the retcode\nto SHOT. If we have called tcf_mirred_forward(), however, the skb\nis out of our hands and returning SHOT will lead to UaF.\n\nMove the retval override to the error path which actually need it."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: act_mirred: no anula retval si ya perdimos el skb. Si estamos redirigiendo el skb y a\u00fan no hemos llamado a tcf_mirred_forward(), necesitamos para decirle al n\u00facleo que suelte el skb configurando el c\u00f3digo de retecci\u00f3n en SHOT. Sin embargo, si hemos llamado a tcf_mirred_forward(), el skb est\u00e1 fuera de nuestras manos y devolver SHOT conducir\u00e1 a UaF. Mueva la anulaci\u00f3n de recuperaci\u00f3n a la ruta de error que realmente la necesita."
    }
  ],
  "id": "CVE-2024-26739",
  "lastModified": "2026-08-04T11:17:00.353",
  "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": 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": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-26739",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:51:53.930424Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-04-03T17:15:51.367",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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      "url": "https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "Patch"
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      "url": "https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754"
    },
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    },
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      "tags": [
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      ],
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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    },
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-26739 (GCVE-0-2024-26739)

Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-08-05 11:26

Title

net/sched: act_mirred: don't override retval if we already lost the skb

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:51 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6667 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0117fe0a4615a7c8d…
https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e9…
https://git.kernel.org/stable/c/e873e8f7d03a2ee5b…
https://git.kernel.org/stable/c/28cdbbd38a4413b8e…
https://git.kernel.org/stable/c/f4e294bbdca8ac875…
https://git.kernel.org/stable/c/166c2c8a6a4dc2e4c…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < 0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd (git) Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < 9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5 (git) Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < e873e8f7d03a2ee5b77fb1a305c782fed98e2754 (git) Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < 28cdbbd38a4413b8eff53399b3f872fd4e80db9d (git) Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < f4e294bbdca8ac8757db436fc82214f3882fc7e7 (git) Affected: e5cf1baf92cb785b90390db1c624948e70c8b8bd , < 166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210 (git)
Linux	Linux	Affected: 4.19 Unaffected: 0 , < 4.19 (semver) Unaffected: 5.10.238 , ≤ 5.10.* (semver) Unaffected: 5.15.182 , ≤ 5.15.* (semver) Unaffected: 6.1.136 , ≤ 6.1.* (semver) Unaffected: 6.6.19 , ≤ 6.6.* (semver) Unaffected: 6.7.7 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:29:31.734Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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            ],
            "url": "https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26739",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:51:53.930424Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:18.399Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "e873e8f7d03a2ee5b77fb1a305c782fed98e2754",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
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            {
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              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "f4e294bbdca8ac8757db436fc82214f3882fc7e7",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            },
            {
              "lessThan": "166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210",
              "status": "affected",
              "version": "e5cf1baf92cb785b90390db1c624948e70c8b8bd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.182",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.238",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.182",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.136",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.19",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.7",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_mirred: don\u0027t override retval if we already lost the skb\n\nIf we\u0027re redirecting the skb, and haven\u0027t called tcf_mirred_forward(),\nyet, we need to tell the core to drop the skb by setting the retcode\nto SHOT. If we have called tcf_mirred_forward(), however, the skb\nis out of our hands and returning SHOT will lead to UaF.\n\nMove the retval override to the error path which actually need it."
        }
      ],
      "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 configuration (ingress qdisc + filter with an act_mirred redirect) must be installed locally via rtnetlink, and the attacker drives the trigger by injecting frames locally into that device. Per kernel scoring convention, tc/qdisc netlink-configured paths are Local.\nAC:L - There is no race or memory-layout precondition; the attacker fully controls both the mirred configuration and the drop condition (unhandled ethertype, or a drop filter/saturated qdisc on the target device), so every injected packet deterministically produces the double free.\nPR:L - Configuring the mirred action requires only CAP_NET_ADMIN within a network namespace, which any unprivileged user obtains via `unshare -Urn`; CAP_NET_RAW in that same user namespace supplies the AF_PACKET frame injection.\nUI:N - The attacker sets up the qdisc/filter and sends the packets entirely on their own; no action by any other user or administrator is needed.\nS:U - The corruption is confined to the kernel\u0027s own heap and privilege domain; no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The skb and its data buffer are freed twice, so the same slab object is handed to two owners; this use-after-free lets an attacker read the contents of a kernel object aliased onto the reclaimed skb, giving arbitrary kernel memory disclosure.\nI:H - The same double-free/UAF primitive permits heap spraying of the reclaimed skb with attacker-controlled data, yielding a write primitive over adjacent kernel structures and a path to control-flow hijack and privilege escalation.\nA:H - Even without further exploitation, freeing an already-freed skb corrupts the slab freelist and reliably triggers a kernel oops/panic (or BUG on a debug kernel), and it can be repeated at packet rate."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:26:57.172Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5"
        },
        {
          "url": "https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754"
        },
        {
          "url": "https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210"
        }
      ],
      "title": "net/sched: act_mirred: don\u0027t override retval if we already lost the skb",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26739",
    "datePublished": "2024-04-03T17:00:24.879Z",
    "dateReserved": "2024-02-19T14:20:24.166Z",
    "dateUpdated": "2026-08-05T11:26:57.172Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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.

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