{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53032", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.380Z", "datePublished": "2026-06-24T16:29:39.916Z", "dateUpdated": "2026-06-24T16:29:39.916Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:29:39.916Z"}, "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->btf) call dereferences\nNULL.\n\nMove the base_type() != PTR_TO_BTF_ID guard before any reg->btf\naccess."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/verifier.c"], "versions": [{"version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3", "lessThan": "520454e839710c327808c2fcc98e28cee77355fc", "status": "affected", "versionType": "git"}, {"version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3", "lessThan": "0a36c1f72888bca0237295a4da19cd91821a90be", "status": "affected", "versionType": "git"}, {"version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3", "lessThan": "6982653ce5f119982aa58f1af58e7bfbebf39252", "status": "affected", "versionType": "git"}, {"version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3", "lessThan": "da1d615ce49a47986a8864e2371a26e97861085c", "status": "affected", "versionType": "git"}, {"version": "ab6c637ad0276e42f8acabcbc64932a6d346dab3", "lessThan": "4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad", "status": "affected", "versionType": "git"}, {"version": "af3d2e0f3a54e67806959d161e613457772babc5", "status": "affected", "versionType": "git"}, {"version": "4782968e0d631b0d8944dcfd4bf8fb49be087101", "status": "affected", "versionType": "git"}, {"version": "6.4.16", "lessThan": "6.5", "status": "affected", "versionType": "semver"}, {"version": "6.5.3", "lessThan": "6.6", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/verifier.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc"}, {"url": "https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be"}, {"url": "https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252"}, {"url": "https://git.kernel.org/stable/c/da1d615ce49a47986a8864e2371a26e97861085c"}, {"url": "https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad"}], "title": "bpf: Fix NULL deref in map_kptr_match_type for scalar regs", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: bpf: Fix NULL deref in map_kptr_match_type for scalar regs", "id": "2492400", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492400"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix NULL deref in map_kptr_match_type for scalar regs\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->btf) call dereferences\nNULL.\nMove the base_type() != PTR_TO_BTF_ID guard before any reg->btf\naccess.", "A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. This vulnerability occurs in the map_kptr_match_type function when a scalar register is stored into a kernel pointer (kptr) slot. Due to an incorrect order of checks, the system attempts to access a null pointer, specifically a BPF Type Format (BTF) definition that does not exist for scalar registers. This null pointer dereference can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-53032", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53032\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53032\nhttps://lore.kernel.org/linux-cve-announce/2026062454-CVE-2026-53032-464e@gregkh/T"], "threat_severity": "Moderate"}

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