FKIE_CVE-2025-68744

Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2026-10-13 10:10
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/hashtab.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "994d6303ed0b84cbc795bb5becf7ed6de40d3f3c",
              "status": "affected",
              "version": "65334e64a493c6a0976de7ad56bf8b7a9ff04b4a",
              "versionType": "git"
            },
            {
              "lessThan": "3bf1378747e251571e0de15e7e0a6bf2919044e7",
              "status": "affected",
              "version": "65334e64a493c6a0976de7ad56bf8b7a9ff04b4a",
              "versionType": "git"
            },
            {
              "lessThan": "96a5cb7072cabbac5c66ac9318242c3bdceebb68",
              "status": "affected",
              "version": "65334e64a493c6a0976de7ad56bf8b7a9ff04b4a",
              "versionType": "git"
            },
            {
              "lessThan": "4a03d69cece145e4fb527464be29c3806aa3221e",
              "status": "affected",
              "version": "65334e64a493c6a0976de7ad56bf8b7a9ff04b4a",
              "versionType": "git"
            },
            {
              "lessThan": "6af6e49a76c9af7d42eb923703e7648cb2bf401a",
              "status": "affected",
              "version": "65334e64a493c6a0976de7ad56bf8b7a9ff04b4a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/hashtab.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "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\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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Liberar campos especiales al actualizar mapas [lru_,]percpu_hash\n\nDado que los mapas [lru_,]percpu_hash soportan BPF_KPTR_{REF,PERCPU}, las llamadas faltantes a \u0027bpf_obj_free_fields()\u0027 en \u0027pcpu_copy_value()\u0027 podr\u00edan causar que la memoria referenciada por los campos BPF_KPTR_{REF,PERCPU} se retenga hasta que el mapa sea liberado.\n\nSolucionar esto llamando a \u0027bpf_obj_free_fields()\u0027 despu\u00e9s de \u0027copy_map_value[,_long]()\u0027 en \u0027pcpu_copy_value()\u0027."
    }
  ],
  "id": "CVE-2025-68744",
  "lastModified": "2026-10-13T10:10:00.193",
  "metrics": {},
  "published": "2025-12-24T13:16:29.343",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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",
      "url": "https://git.kernel.org/stable/c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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