CVE-2026-64354

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A malformed BTF can wrap that calculation, causing the check to\npass even when the expanded field count exceeds the scratch array\ncapacity. The following memcpy() can then write past the end of the\narray.\n\nUse checked addition and multiplication before copying repeated fields\nand reject impossible counts."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The attacker reaches the vulnerable parser through the local bpf(BPF_BTF_LOAD) syscall; no network or physical path exists.\nAC:L - A compact, deterministic malformed BTF object triggers the arithmetic wrap and immediate out-of-bounds memcpy without a race or uncontrollable condition.\nPR:L - BPF_BTF_LOAD normally requires init-namespace CAP_BPF, but a delegated BPF token permits CAP_BPF in its user namespace. 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A malformed BTF can wrap that calculation, causing the check to\npass even when the expanded field count exceeds the scratch array\ncapacity. The following memcpy() can then write past the end of the\narray.\n\nUse checked addition and multiplication before copying repeated fields\nand reject impossible counts."}], "id": "CVE-2026-64354", "lastModified": "2026-10-19T21:17:32.607", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64354", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:39:17.311351Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:17.810", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9452b594fd3aecbfd4aa0a6a1f741330a37dab7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5ff816d5f13900c3f1f3298cfcc61339e056e56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cd407de2ef5dc70f1970b343ffaa16186340fdfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ff77d013b737c0f77d925e2f2c59f0cf3d76bd35"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: bpf: Validate BTF repeated field counts before expansion", "id": "2507284", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507284"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) component. This vulnerability, located in the `btf_repeat_fields()` function, is caused by an integer overflow when processing user-supplied BPF Type Format (BTF) data. A local attacker could exploit this flaw by providing a specially crafted BTF, leading to a heap out-of-bounds write. This could result in privilege escalation, allowing the attacker to gain elevated access to the system."], "name": "CVE-2026-64354", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64354\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64354\nhttps://lore.kernel.org/linux-cve-announce/2026072519-CVE-2026-64354-a771@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[797d73ee232dd1833dec4824bc53a22032e97c1c,c5ff816d5f13900c3f1f3298cfcc61339e056e56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[797d73ee232dd1833dec4824bc53a22032e97c1c,cd407de2ef5dc70f1970b343ffaa16186340fdfd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[797d73ee232dd1833dec4824bc53a22032e97c1c,ff77d013b737c0f77d925e2f2c59f0cf3d76bd35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[797d73ee232dd1833dec4824bc53a22032e97c1c,b9452b594fd3aecbfd4aa0a6a1f741330a37dab7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "6f957d972feee9b385ea3ae6530310a84e55ba71"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.11.6,6.12)"}}], "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": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.96,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.39,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.4,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "7.2-rc1"}}], "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": "2026-07-25T14:30:03.598025+00:00", "updated": "2026-10-20T14:00:16.565489+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}