CVE-2024-44963

{
  "id": "CVE-2024-44963",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-09-04T19:15:30.883",
  "lastModified": "2026-10-30T13:17:34.877",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON() when freeing tree block after error\n\nWhen freeing a tree block, at btrfs_free_tree_block(), if we fail to\ncreate a delayed reference we don't deal with the error and just do a\nBUG_ON(). The error most likely to happen is -ENOMEM, and we have a\ncomment mentioning that only -ENOMEM can happen, but that is not true,\nbecause in case qgroups are enabled any error returned from\nbtrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned\nfrom btrfs_search_slot() for example) can be propagated back to\nbtrfs_free_tree_block().\n\nSo stop doing a BUG_ON() and return the error to the callers and make\nthem abort the transaction to prevent leaking space. Syzbot was\ntriggering this, likely due to memory allocation failure injection."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no hacer BUG_ON() al liberar un bloque de árbol después de un error Al liberar un bloque de árbol, en btrfs_free_tree_block(), si no podemos crear una referencia retrasada, no nos ocupamos del error y simplemente hacemos un BUG_ON(). El error más probable que ocurra es -ENOMEM, y tenemos un comentario que menciona que solo puede ocurrir -ENOMEM, pero eso no es cierto, porque en caso de que los qgroups estén habilitados, cualquier error devuelto por btrfs_qgroup_trace_extent_post() (puede ser -EUCLEAN o cualquier cosa devuelta por btrfs_search_slot(), por ejemplo) se puede propagar de vuelta a btrfs_free_tree_block(). Así que deja de hacer un BUG_ON() y devuelve el error a los llamadores y haz que aborten la transacción para evitar fugas de espacio. Syzbot estaba activando esto, probablemente debido a la inyección de fallo de asignación de memoria."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/btrfs/ctree.c",
            "fs/btrfs/extent-tree.c",
            "fs/btrfs/extent-tree.h",
            "fs/btrfs/free-space-tree.c",
            "fs/btrfs/ioctl.c",
            "fs/btrfs/qgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "fb235dc06fac9eaa4408ade9c8b20d45d63c89b7",
              "lessThan": "bfcef12f80b3a9bd6b09c7305679164e3307328a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fb235dc06fac9eaa4408ade9c8b20d45d63c89b7",
              "lessThan": "22d907bcd283d69d5e60497fc0d51969545c583b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fb235dc06fac9eaa4408ade9c8b20d45d63c89b7",
              "lessThan": "98251cd60b4d702a8a81de442ab621e83a3fb24f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fb235dc06fac9eaa4408ade9c8b20d45d63c89b7",
              "lessThan": "bb3868033a4cccff7be57e9145f2117cbdc91c11",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/btrfs/ctree.c",
            "fs/btrfs/extent-tree.c",
            "fs/btrfs/extent-tree.h",
            "fs/btrfs/free-space-tree.c",
            "fs/btrfs/ioctl.c",
            "fs/btrfs/qgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.11",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.11",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.64",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.10.5",
              "lessThanOrEqual": "6.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.11",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2024-09-10T17:39:41.059166Z",
          "id": "CVE-2024-44963",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
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          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
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  "configurations": [
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  "references": [
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      "url": "https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}