FKIE_CVE-2026-74606

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
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: eventfs: Fix use-after-free in eventfs_remove_rec() eventfs_remove_rec() recursively removes the child at the current loop position. After the recursive call returns, list_for_each_entry() advances by reading list.next from the removed child. If free_ei() drops the final reference, release_ei() reuses the list/rcu union to queue an SRCU callback. The child may be freed before that read. The eventfs_mutex serializes list updates, but it does not keep the removed child alive or prevent the SRCU callback from running. Use list_for_each_entry_safe() to save the next sibling before recursively removing the current child.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5635211b44969f4816e29ec4d5f8665fb39535d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74bb1eaf72d185a78c879eb2678ea500f82f46a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b77581b25e213e83b79ce11eb30024e55ceeb3e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f161d7861a0bfdf10af6b738b3b57636204661fb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd73b691702170d37d66f4b0278530cea8ed419a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/tracefs/event_inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b77581b25e213e83b79ce11eb30024e55ceeb3e9",
              "status": "affected",
              "version": "5dfb04100326f70e3b2d2872c2476ed20b804837",
              "versionType": "git"
            },
            {
              "lessThan": "f161d7861a0bfdf10af6b738b3b57636204661fb",
              "status": "affected",
              "version": "43aa6f97c2d03a52c1ddb86768575fc84344bdbb",
              "versionType": "git"
            },
            {
              "lessThan": "5635211b44969f4816e29ec4d5f8665fb39535d0",
              "status": "affected",
              "version": "43aa6f97c2d03a52c1ddb86768575fc84344bdbb",
              "versionType": "git"
            },
            {
              "lessThan": "74bb1eaf72d185a78c879eb2678ea500f82f46a8",
              "status": "affected",
              "version": "43aa6f97c2d03a52c1ddb86768575fc84344bdbb",
              "versionType": "git"
            },
            {
              "lessThan": "fd73b691702170d37d66f4b0278530cea8ed419a",
              "status": "affected",
              "version": "43aa6f97c2d03a52c1ddb86768575fc84344bdbb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5a43badefe0eccca0c26144c0a44b8d417ce8103",
              "versionType": "git"
            },
            {
              "lessThan": "6.6.152",
              "status": "affected",
              "version": "6.6.18",
              "versionType": "semver"
            },
            {
              "lessThan": "6.8",
              "status": "affected",
              "version": "6.7.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/tracefs/event_inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neventfs: Fix use-after-free in eventfs_remove_rec()\n\neventfs_remove_rec() recursively removes the child at the current loop\nposition. After the recursive call returns, list_for_each_entry() advances\nby reading list.next from the removed child.\n\nIf free_ei() drops the final reference, release_ei() reuses the list/rcu\nunion to queue an SRCU callback. The child may be freed before that read.\nThe eventfs_mutex serializes list updates, but it does not keep the removed\nchild alive or prevent the SRCU callback from running.\n\nUse list_for_each_entry_safe() to save the next sibling before recursively\nremoving the current child."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\neventfs: Soluci\u00f3n para el uso despu\u00e9s de liberaci\u00f3n en eventfs_remove_rec()\n\neventfs_remove_rec() elimina recursivamente el hijo en la posici\u00f3n actual del bucle. Despu\u00e9s de que la llamada recursiva regresa, list_for_each_entry() avanza leyendo list.next del hijo eliminado.\n\nSi free_ei() libera la referencia final, release_ei() reutiliza la uni\u00f3n list/rcu para encolar una llamada de retorno SRCU. El hijo puede ser liberado antes de esa lectura. El eventfs_mutex serializa las actualizaciones de la lista, pero no mantiene vivo al hijo eliminado ni evita que se ejecute la llamada de retorno SRCU.\n\nUtilizar list_for_each_entry_safe() para guardar el siguiente hermano antes de eliminar recursivamente el hijo actual."
    }
  ],
  "id": "CVE-2026-74606",
  "lastModified": "2026-10-14T13:10:00.187",
  "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"
      }
    ]
  },
  "published": "2026-08-22T16:16:33.077",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5635211b44969f4816e29ec4d5f8665fb39535d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74bb1eaf72d185a78c879eb2678ea500f82f46a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b77581b25e213e83b79ce11eb30024e55ceeb3e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f161d7861a0bfdf10af6b738b3b57636204661fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fd73b691702170d37d66f4b0278530cea8ed419a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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