FKIE_CVE-2026-46129

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-06-17 10:53
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: btrfs: fix double free in create_space_info() error path When kobject_init_and_add() fails, the call chain is: create_space_info() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&space_info->kobj) -> space_info_release() -> kfree(space_info) Then control returns to create_space_info(): btrfs_sysfs_add_space_info_type() returns error -> goto out_free -> kfree(space_info) This causes a double free. Keep the direct kfree(space_info) for the earlier failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f487be81292702a59ea9dbc4088b3360a50e837
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a060970fd7b5e1c561e4ce73cb9949e4269a738
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2670ec4aa49ca226bce9776601e0da37502be07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd6ade0fdd59218d71a981ae7c937a304e49209c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f414b3abbba59ef379a2b3c31f2bdd9358ed5e53
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/space-info.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5",
              "status": "affected",
              "version": "20e8f2de3688082eeafeb93c8900485b7542457e",
              "versionType": "git"
            },
            {
              "lessThan": "c2670ec4aa49ca226bce9776601e0da37502be07",
              "status": "affected",
              "version": "58208907c4044a764dbd8896026283905da6d9be",
              "versionType": "git"
            },
            {
              "lessThan": "f414b3abbba59ef379a2b3c31f2bdd9358ed5e53",
              "status": "affected",
              "version": "bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618",
              "versionType": "git"
            },
            {
              "lessThan": "9a060970fd7b5e1c561e4ce73cb9949e4269a738",
              "status": "affected",
              "version": "6cb008f1bb23e023dfe615cca5df14570dfc8da5",
              "versionType": "git"
            },
            {
              "lessThan": "dd6ade0fdd59218d71a981ae7c937a304e49209c",
              "status": "affected",
              "version": "a11224a016d6d1d46a4d9b6573244448a80d4d7f",
              "versionType": "git"
            },
            {
              "lessThan": "3f487be81292702a59ea9dbc4088b3360a50e837",
              "status": "affected",
              "version": "a11224a016d6d1d46a4d9b6573244448a80d4d7f",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.175",
              "status": "affected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.140",
              "status": "affected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.88",
              "status": "affected",
              "version": "6.12.67",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.30",
              "status": "affected",
              "version": "6.18.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/space-info.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\nbtrfs: fix double free in create_space_info() error path\n\nWhen kobject_init_and_add() fails, the call chain is:\n\ncreate_space_info()\n-\u003e btrfs_sysfs_add_space_info_type()\n-\u003e kobject_init_and_add()\n-\u003e failure\n-\u003e kobject_put(\u0026space_info-\u003ekobj)\n-\u003e space_info_release()\n-\u003e kfree(space_info)\n\nThen control returns to create_space_info():\n\nbtrfs_sysfs_add_space_info_type() returns error\n-\u003e goto out_free\n-\u003e kfree(space_info)\n\nThis causes a double free.\n\nKeep the direct kfree(space_info) for the earlier failure path, but\nafter btrfs_sysfs_add_space_info_type() has called kobject_put(), let\nthe kobject release callback handle the cleanup."
    }
  ],
  "id": "CVE-2026-46129",
  "lastModified": "2026-06-17T10:53:07.000",
  "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": "2026-05-28T10:16:28.473",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f487be81292702a59ea9dbc4088b3360a50e837"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a060970fd7b5e1c561e4ce73cb9949e4269a738"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2670ec4aa49ca226bce9776601e0da37502be07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd6ade0fdd59218d71a981ae7c937a304e49209c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f414b3abbba59ef379a2b3c31f2bdd9358ed5e53"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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