CVE-2025-71300

#!/bin/bash # PoC script to check for CVE-2025-71300 vulnerability signs # This checks if the system might be missing the reserved-memory node due to the manual OP-TEE node. if [ "$(uname -m)" != "aarch64" ]; then echo "[+] System is not ARM64, likely not affected." exit 0 fi echo "[*] Checking Device Tree for OP-TEE configuration..." # Check if the optee node exists in the live device tree if [ -d /sys/firmware/devicetree/base/firmware/optee ]; then echo "[!] OP-TEE node detected." # Check if reserved-memory node for optee is present (simplified check) # In a vulnerable scenario, the mapping might be inconsistent or missing expected regions. if [ ! -d /sys/firmware/devicetree/base/reserved-memory ]; then echo "[!!!] CRITICAL: reserved-memory node missing. System is vulnerable to CVE-2025-71300." echo "[!!!] This can lead to memory access violations during runtime." else echo "[-] reserved-memory node found. System might be patched or manually fixed." fi else echo "[-] OP-TEE node not found." fi

{"cve": {"id": "CVE-2025-71300", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T14:16:31.387", "lastModified": "2026-05-14T19:10:26.850", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"arm64: zynqmp: Add an OP-TEE node to the device tree\"\n\nThis reverts commit 06d22ed6b6635b17551f386b50bb5aaff9b75fbe.\n\nOP-TEE logic in U-Boot automatically injects a reserved-memory\nnode along with optee firmware node to kernel device tree.\nThe injection logic is dependent on that there is no manually\ndefined optee node. Having the node in zynqmp.dtsi effectively\nbreaks OP-TEE's insertion of the reserved-memory node, causing\nmemory access violations during runtime."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.75", "matchCriteriaId": "F8A1C6F6-2847-4C53-ABFC-8F07D96900D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2a833c730d4e8d1cc10953270ce0f3a156145d81", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/3983ef126e439900bbf419724a9759863c146660", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/c197179990124f991fca220d97fac56779a02c6d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/eece81eeda10eb42c687399fb5aa69977ae15664", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}