{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-54033",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-54033"
  ],
  "published": "2025-12-24T10:57:20Z",
  "summary": "bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps",
  "details": "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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.31"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-54033"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1a9e80f757bbb1562d82e350afce2bb2f712cc3d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b34ffb0c6d23583830f9327864b9c1f486003305"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}