{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64520", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:14:46.005Z", "dateUpdated": "2026-07-27T05:01:37.019Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-27T05:01:37.019Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies\n\nThe register-based PARTITION_INFO_GET path trusted the firmware-provided\nindices when copying partition descriptors into the caller buffer.\nReject inconsistent counts or index progressions so the copy loop cannot\nwrite past the allocated array.\n\n(fixed cur_idx when exactly one descriptor in the first fragment)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/arm_ffa/driver.c"], "versions": [{"version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954", "lessThan": "f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95", "status": "affected", "versionType": "git"}, {"version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954", "lessThan": "79d95c02ae0a95e6e80e8e92b7ca74ecee02854f", "status": "affected", "versionType": "git"}, {"version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954", "lessThan": "3974ea1938406f9bfa7c1f48d4e43533f447bb08", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/arm_ffa/driver.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "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": "6.12", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95"}, {"url": "https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f"}, {"url": "https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08"}], "title": "firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies", "id": "2507247", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507247"}, "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 ARM Firmware Framework for ARM (FFA). The PARTITION_INFO_GET_REGS function, which handles copying partition descriptors, did not adequately validate the indices provided by the firmware. This oversight could allow the system to process inconsistent data, resulting in an out-of-bounds write. Such an issue can lead to memory corruption, potentially causing system instability or a denial of service."], "name": "CVE-2026-64520", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not 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-2026-64520\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64520\nhttps://lore.kernel.org/linux-cve-announce/2026072538-CVE-2026-64520-82ff@gregkh/T"], "threat_severity": "Moderate"}