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CVE-2023-54033

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps

The LRU and LRU_PERCPU maps allocate a new element on update before locking the target hash table bucket. Right after that the maps try to lock the bucket. If this fails, then maps return -EBUSY to the caller without releasing the allocated element. This makes the element untracked: it doesn't belong to either of free lists, and it doesn't belong to the hash table, so can't be re-used; this eventually leads to the permanent -ENOMEM on LRU map updates, which is unexpected. Fix this by returning the element to the local free list if bucket locking fails.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-54033",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "20b6cc34ea74b6a84599c1f8a70f3315b56a1883",
              "lessThan": "79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "20b6cc34ea74b6a84599c1f8a70f3315b56a1883",
              "lessThan": "1a9e80f757bbb1562d82e350afce2bb2f712cc3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "20b6cc34ea74b6a84599c1f8a70f3315b56a1883",
              "lessThan": "965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "20b6cc34ea74b6a84599c1f8a70f3315b56a1883",
              "lessThan": "b34ffb0c6d23583830f9327864b9c1f486003305",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/bpf/hashtab.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.115",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.31",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/hashtab.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T11:15:56.297",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1a9e80f757bbb1562d82e350afce2bb2f712cc3d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b34ffb0c6d23583830f9327864b9c1f486003305",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix a memory leak in the LRU and LRU_PERCPU hash maps\n\nThe LRU and LRU_PERCPU maps allocate a new element on update before locking the\ntarget hash table bucket. Right after that the maps try to lock the bucket.\nIf this fails, then maps return -EBUSY to the caller without releasing the\nallocated element. This makes the element untracked: it doesn't belong to\neither of free lists, and it doesn't belong to the hash table, so can't be\nre-used; this eventually leads to the permanent -ENOMEM on LRU map updates,\nwhich is unexpected. Fix this by returning the element to the local free list\nif bucket locking fails."
    }
  ],
  "lastModified": "2026-06-17T06:46:34.477",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}