cve-2026-64075

{
  "cvss": 7.8,
  "datePublished": "2026-07-19T16:17:48.113",
  "dateUpdated": "2026-09-03T14:46:17.820",
  "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nfprobe: Fix unregister_fprobe() to wait for RCU grace period\n\nCommit 4346ba1604093 (\"fprobe: Rewrite fprobe on function-graph tracer\")\nchanged fprobe to register struct fprobe to an rcu-hlist, but it forgot\nto wait for RCU GP. Thus there can be use-after-free if the fprobe is\nreleased right after unregistering. This can be happened on fprobe\nevent and sample module code.\n\nTo fix this issue, add synchronize_rcu() in unregister_fprobe().\n\nNote that BPF is OK because fprobe is used as a part of\nbpf_kprobe_multi_link. This unregisters its fprobe in\nbpf_kprobe_multi_link_release() and it is deallocated via\nbpf_kprobe_multi_link_dealloc(), which is invoked from\nbpf_link_defer_dealloc_rcu_gp() RCU callback.\n\nFor BPF, this also introduced unregister_fprobe_async() which does\nNOT wait for RCU grace priod.",
  "id": "CVE-2026-64075",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Linux",
            "programFiles": [
              "include/linux/fprobe.h",
              "kernel/trace/bpf_trace.c",
              "kernel/trace/fprobe.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "lessThan": "56b4cfcf1518245493c60fd39c56978f508f1816",
                "status": "affected",
                "version": "4346ba1604093305a287e08eb465a9c15ba05b80",
                "versionType": "git"
              },
              {
                "lessThan": "a4f6a9005ed6cfd360ef2520430927f05f92ffb0",
                "status": "affected",
                "version": "4346ba1604093305a287e08eb465a9c15ba05b80",
                "versionType": "git"
              },
              {
                "lessThan": "657b594b2084b39a4bc6d8493aa2140cb00cea49",
                "status": "affected",
                "version": "4346ba1604093305a287e08eb465a9c15ba05b80",
                "versionType": "git"
              }
            ]
          },
          {
            "defaultStatus": "affected",
            "product": "Linux",
            "programFiles": [
              "include/linux/fprobe.h",
              "kernel/trace/bpf_trace.c",
              "kernel/trace/fprobe.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "6.14"
              },
              {
                "lessThan": "6.14",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.34",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.*",
                "status": "unaffected",
                "version": "7.0.11",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
          }
        ],
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "3D570635-8F4B-4658-A288-87338DAB4680",
                "versionEndExcluding": "6.18.34",
                "versionStartIncluding": "6.14",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "0520D091-FC52-4A50-AF07-70AE7D08B750",
                "versionEndExcluding": "7.0.11",
                "versionStartIncluding": "6.19",
                "vulnerable": true
              },
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                "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
                "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
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              },
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            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfprobe: Fix unregister_fprobe() to wait for RCU grace period\n\nCommit 4346ba1604093 (\"fprobe: Rewrite fprobe on function-graph tracer\")\nchanged fprobe to register struct fprobe to an rcu-hlist, but it forgot\nto wait for RCU GP. Thus there can be use-after-free if the fprobe is\nreleased right after unregistering. This can be happened on fprobe\nevent and sample module code.\n\nTo fix this issue, add synchronize_rcu() in unregister_fprobe().\n\nNote that BPF is OK because fprobe is used as a part of\nbpf_kprobe_multi_link. This unregisters its fprobe in\nbpf_kprobe_multi_link_release() and it is deallocated via\nbpf_kprobe_multi_link_dealloc(), which is invoked from\nbpf_link_defer_dealloc_rcu_gp() RCU callback.\n\nFor BPF, this also introduced unregister_fprobe_async() which does\nNOT wait for RCU grace priod."
      }
    ],
    "id": "CVE-2026-64075",
    "lastModified": "2026-09-03T14:46:17.820",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "published": "2026-07-19T16:17:48.113",
    "references": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/56b4cfcf1518245493c60fd39c56978f508f1816"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/657b594b2084b39a4bc6d8493aa2140cb00cea49"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/a4f6a9005ed6cfd360ef2520430927f05f92ffb0"
      }
    ],
    "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-416"
          }
        ],
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "severity": "HIGH",
  "source": "nvd",
  "title": "In the Linux kernel, the following vulnerability has been resolved:\n\nfprobe: Fix unregister_fprobe() to wait for RCU ..."
}