FKIE_CVE-2026-53032

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL deref in map_kptr_match_type for scalar regs Commit ab6c637ad027 ("bpf: Fix a bpf_kptr_xchg() issue with local kptr") refactored map_kptr_match_type() to branch on btf_is_kernel() before checking base_type(). A scalar register stored into a kptr slot has no btf, so the btf_is_kernel(reg->btf) call dereferences NULL. Move the base_type() != PTR_TO_BTF_ID guard before any reg->btf access.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da1d615ce49a47986a8864e2371a26e97861085c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "520454e839710c327808c2fcc98e28cee77355fc",
              "status": "affected",
              "version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3",
              "versionType": "git"
            },
            {
              "lessThan": "0a36c1f72888bca0237295a4da19cd91821a90be",
              "status": "affected",
              "version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3",
              "versionType": "git"
            },
            {
              "lessThan": "6982653ce5f119982aa58f1af58e7bfbebf39252",
              "status": "affected",
              "version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3",
              "versionType": "git"
            },
            {
              "lessThan": "da1d615ce49a47986a8864e2371a26e97861085c",
              "status": "affected",
              "version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3",
              "versionType": "git"
            },
            {
              "lessThan": "4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad",
              "status": "affected",
              "version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "af3d2e0f3a54e67806959d161e613457772babc5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4782968e0d631b0d8944dcfd4bf8fb49be087101",
              "versionType": "git"
            },
            {
              "lessThan": "6.5",
              "status": "affected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6",
              "status": "affected",
              "version": "6.5.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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: Fix NULL deref in map_kptr_match_type for scalar regs\n\nCommit ab6c637ad027 (\"bpf: Fix a bpf_kptr_xchg() issue with local\nkptr\") refactored map_kptr_match_type() to branch on btf_is_kernel()\nbefore checking base_type(). A scalar register stored into a kptr\nslot has no btf, so the btf_is_kernel(reg-\u003ebtf) call dereferences\nNULL.\n\nMove the base_type() != PTR_TO_BTF_ID guard before any reg-\u003ebtf\naccess."
    }
  ],
  "id": "CVE-2026-53032",
  "lastModified": "2026-06-24T17:17:14.590",
  "metrics": {},
  "published": "2026-06-24T17:17:14.590",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/da1d615ce49a47986a8864e2371a26e97861085c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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