{"id":6583,"date":"2025-09-02T10:03:56","date_gmt":"2025-09-02T10:03:56","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2025\/09\/02\/critical-qualcomm-vulnerabilities-allow-attackers-to-execute-arbitrary-code-remotely\/"},"modified":"2025-09-02T10:03:56","modified_gmt":"2025-09-02T10:03:56","slug":"critical-qualcomm-vulnerabilities-allow-attackers-to-execute-arbitrary-code-remotely","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2025\/09\/02\/critical-qualcomm-vulnerabilities-allow-attackers-to-execute-arbitrary-code-remotely\/","title":{"rendered":"Critical Qualcomm Vulnerabilities Allow Attackers to Execute Arbitrary Code Remotely"},"content":{"rendered":"

Critical Qualcomm Vulnerabilities Allow Attackers to Execute Arbitrary Code Remotely
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Multiple critical vulnerabilities in Qualcomm Technologies\u2019 proprietary Data Network Stack and Multi-Mode Call Processor that permit remote attackers to execute arbitrary code.\u00a0<\/p>\n

These flaws, tracked as CVE-2025-21483 and CVE-2025-27034, each carry a CVSS score of 9.8 and exploit buffer-corruption weaknesses to compromise device security.<\/p>\n

Key Takeaways<\/strong><\/mark>
1. CVE-2025-21483 & CVE-2025-27034 allow remote RCE.
2. Affects Snapdragon 8 Gen1\/Gen2, FastConnect, X55, IoT\/automotive chips.
3. Patch now and filter RTP\/PLMN traffic.<\/pre>\n
CVE-2025-21483: Remote Heap Buffer Overflow\u00a0<\/strong><\/h2>\n
The most severe issue, CVE-2025-21483, resides in Qualcomm\u2019s Real-time Transport Protocol (RTP) packet reassembly within the Data Network Stack & Connectivity module.\u00a0<\/p>\n
An attacker can send a malicious RTP packet that triggers a heap-based buffer overflow<\/a> (CWE-119) by overrunning the NALU reassembly buffer.\u00a0<\/p>\n
With a remote access vector and no user interaction required, this vulnerability enables full control over affected chipsets<\/a>, including Snapdragon 8 Gen1, Snapdragon 8 Gen2, FastConnect 7800, and dozens more.\u00a0<\/p>\n
Once exploited, arbitrary code execution at the kernel level can occur, compromising data confidentiality, integrity, and availability.<\/p>\n
CVE-2025-27034: Improper Array Index Validation Flaw<\/strong><\/h2>\n
Equally critical is CVE-2025-27034, which stems from an improper validation of an array index (CWE-129) in the Multi-Mode Call Processor.\u00a0<\/p>\n
Attackers can craft a malformed Public Land Mobile Network (PLMN) selection response that corrupts memory during index parsing.\u00a0<\/p>\n
The flaw\u2019s remote access vector and lack of privilege requirements make it exploitable over the network.\u00a0<\/p>\n
Affected platforms include the Snapdragon X55 5G Modem-RF System, Snapdragon 8 Gen1, QCM5430, and numerous IoT and automotive modems. Successful exploitation leads to arbitrary code execution<\/a> with escalated privileges.<\/p>\n
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CVE<\/strong><\/td>\nTitle<\/strong><\/td>\nCVSS 3.1 Score<\/strong><\/td>\nSeverity<\/strong><\/td>\n<\/tr>\n
CVE-2025-21483<\/td>\nImproper Restriction of Operations within the Bounds of a Memory Buffer in Data Network Stack & Connectivity<\/td>\n9.8<\/td>\nCritical<\/td>\n<\/tr>\n
CVE-2025-27034<\/td>\nImproper Validation of Array Index in Multi-Mode Call Processor<\/td>\n9.8<\/td>\nCritical<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n
Mitigations\u00a0<\/strong><\/h2>\n
Qualcomm has issued<\/a> patches for both vulnerabilities, distributing updates directly to OEMs and urging immediate deployment.\u00a0<\/p>\n
The recommended countermeasure is to integrate the proprietary software updates provided in the September 2025 Security Bulletin and verify the presence of hardened bounds-checking routines.\u00a0<\/p>\n
Device manufacturers must ensure timely firmware upgrades to eliminate attack vectors in CVE-2025-21483\u2019s RTP parser and CVE-2025-27034\u2019s array index logic.<\/p>\n
Security researchers emphasize the necessity of monitoring CVSS strings and employing network filtering as an interim safeguard.\u00a0<\/p>\n
Administrators should block unexpected RTP streams and PLMN selection traffic until patched firmware is installed. Additionally, implementing strict SELinux policies on Android platforms can further constrain exploit attempts.<\/p>\n
Stakeholders are advised to audit firmware versions, apply patches immediately, and maintain vigilant network monitoring to defend against these high-severity exploits.<\/p>\n
Qualcomm customers and device end-users should contact their manufacturers or visit Qualcomm\u2019s support portal for detailed patch instructions and chipset coverage details.<\/p>\n
Find this Story Interesting! Follow us on Google News<\/a>,\u00a0LinkedIn<\/a>,\u00a0and\u00a0X<\/a>\u00a0to Get More Instant Updates<\/strong>.<\/p>\n
The post Critical Qualcomm Vulnerabilities Allow Attackers to Execute Arbitrary Code Remotely<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\n
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Critical Qualcomm Vulnerabilities Allow Attackers to Execute Arbitrary Code Remotely Multiple critical vulnerabilities in Qualcomm Technologies\u2019 proprietary Data Network Stack and Multi-Mode Call Processor that permit remote attackers to execute arbitrary code.\u00a0 These flaws, tracked as CVE-2025-21483 and CVE-2025-27034, each carry a CVSS score of 9.8 and exploit buffer-corruption weaknesses to compromise device security. Key […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,63,131,648],"tags":[130],"class_list":["post-6583","post","type-post","status-publish","format-standard","hentry","category-cyber-security","category-cyber-security-news","category-vulnerability","category-vulnerability-news","tag-cyber-security-news"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/6583"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=6583"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/6583\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=6583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=6583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=6583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}