CVE-2025-68744 (GCVE-0-2025-68744)
Vulnerability from cvelistv5
Published
2025-12-24 12:09
Modified
2025-12-24 12:09
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Free special fields when update [lru_,]percpu_hash maps As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the map gets freed. Fix this by calling 'bpf_obj_free_fields()' after 'copy_map_value[,_long]()' in 'pcpu_copy_value()'.
References
Impacted products
Vendor Product Version
Linux Linux Version: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a
Version: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a
Version: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a
Version: 65334e64a493c6a0976de7ad56bf8b7a9ff04b4a
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/hashtab.c"
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          "vendor": "Linux",
          "versions": [
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            },
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              "version": "0",
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to \u0027bpf_obj_free_fields()\u0027 in \u0027pcpu_copy_value()\u0027 could cause the\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\nmap gets freed.\n\nFix this by calling \u0027bpf_obj_free_fields()\u0027 after\n\u0027copy_map_value[,_long]()\u0027 in \u0027pcpu_copy_value()\u0027."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T12:09:40.839Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a"
        }
      ],
      "title": "bpf: Free special fields when update [lru_,]percpu_hash maps",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68744",
    "datePublished": "2025-12-24T12:09:40.839Z",
    "dateReserved": "2025-12-24T10:30:51.031Z",
    "dateUpdated": "2025-12-24T12:09:40.839Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68744\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:29.343\",\"lastModified\":\"2025-12-24T13:16:29.343\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Free special fields when update [lru_,]percpu_hash maps\\n\\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\\ncalls to \u0027bpf_obj_free_fields()\u0027 in \u0027pcpu_copy_value()\u0027 could cause the\\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\\nmap gets freed.\\n\\nFix this by calling \u0027bpf_obj_free_fields()\u0027 after\\n\u0027copy_map_value[,_long]()\u0027 in \u0027pcpu_copy_value()\u0027.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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