CVE-2026-53032

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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."}], "id": "CVE-2026-53032", "lastModified": "2026-11-06T17:18:02.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53032", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:16:49.086438Z", "version": "2.0.3"}}]}, "published": "2026-06-24T17:17:14.590", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da1d615ce49a47986a8864e2371a26e97861085c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"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"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ab6c637ad0276e42f8acabcbc64932a6d346dab3,520454e839710c327808c2fcc98e28cee77355fc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ab6c637ad0276e42f8acabcbc64932a6d346dab3,0a36c1f72888bca0237295a4da19cd91821a90be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ab6c637ad0276e42f8acabcbc64932a6d346dab3,6982653ce5f119982aa58f1af58e7bfbebf39252)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ab6c637ad0276e42f8acabcbc64932a6d346dab3,da1d615ce49a47986a8864e2371a26e97861085c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ab6c637ad0276e42f8acabcbc64932a6d346dab3,4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "af3d2e0f3a54e67806959d161e613457772babc5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "4782968e0d631b0d8944dcfd4bf8fb49be087101"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.16,6.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.3,6.6)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.141,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.91,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.33,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.10,7.0.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-24T19:45:05.748214+00:00", "updated": "2026-06-27T02:15:10.133652+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}