{"id":34366,"date":"2025-05-04T04:58:39","date_gmt":"2025-05-04T04:58:39","guid":{"rendered":""},"modified":"2025-09-14T23:37:02","modified_gmt":"2025-09-15T05:37:02","slug":"cve-2023-33110-race-condition-vulnerability-in-pcm-host-voice-audio-driver","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-33110-race-condition-vulnerability-in-pcm-host-voice-audio-driver\/","title":{"rendered":"<strong>CVE-2023-33110: Race Condition Vulnerability in PCM Host Voice Audio Driver<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>This blog post aims to shed light on an intricate vulnerability, CVE-2023-33110, that has been identified in the PCM host voice audio driver. This vulnerability has widespread implications, as it affects any system that utilizes this driver for audio functionalities. The severity of this problem lies in its potential to cause memory corruption, which can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32849-vulnerability-in-telecontrol-server-basic-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"39217\">lead to system<\/a> compromise or data leakage. Given the ubiquity of this driver and the critical nature of the <a href=\"https:\/\/www.ameeba.com\/blog\/doge-s-access-to-federal-data-raises-cybersecurity-concerns\/\"  data-wpil-monitor-id=\"39348\">data it can access<\/a>, it&#8217;s essential for IT professionals, system administrators, and developers to understand the vulnerability and apply necessary safeguards.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-33110<br \/>\nSeverity: High &#8211; CVSS Score 7.8<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32857-sql-injection-vulnerability-in-telecontrol-server-basic-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"39783\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3010698676\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p>PCM Host Voice Audio Driver | All versions before patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability occurs due to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45953-session-hijacking-vulnerability-in-phpgurukul-hostel-management-system\/\"  data-wpil-monitor-id=\"41185\">race condition between the event callback and the PCM<\/a> close and reset session index. Specifically, the session index variable in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46827-graylog-open-log-management-platform-user-session-cookie-exposure\/\"  data-wpil-monitor-id=\"47632\">PCM host voice audio<\/a> driver is initialized before the PCM is open. It is then accessed during the event callback from the ADSP. If the PCM close and reset session index operation overlaps with the event callback, it leads to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1290-high-severity-race-condition-use-after-free-vulnerability-in-kernel-5-4-on-chromeos\/\"  data-wpil-monitor-id=\"41760\">race condition<\/a>. This race condition can result in memory corruption, which could potentially be exploited by an <a href=\"https:\/\/www.ameeba.com\/blog\/ahold-delhaize-cyber-attack-unpacking-the-data-breach-and-its-implications\/\"  data-wpil-monitor-id=\"39216\">attacker to compromise the system or leak sensitive data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1288549570\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>The following is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"43285\">vulnerability might be exploited<\/a>. This pseudocode shows how an attacker might take advantage of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-3328-snap-confine-race-condition-vulnerability\/\"  data-wpil-monitor-id=\"43284\">race condition<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">\/\/ Attacker triggers event callback\ntriggerEventCallback();\n\/\/ Attacker causes PCM to close and reset session index before event callback is done\nforcePcmCloseReset();\n\/\/ Memory corruption occurs due to race condition\nexploitMemoryCorruption();<\/code><\/pre>\n<p>In the above pseudo code, `triggerEventCallback()` could be a function that causes an event callback in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49661-untrusted-pointer-dereference-vulnerability-in-windows-ancillary-function-driver-for-winsock\/\"  data-wpil-monitor-id=\"80363\">PCM host voice audio<\/a> driver. Meanwhile, `forcePcmCloseReset()` is a function that <a href=\"https:\/\/www.ameeba.com\/blog\/security-breach-forces-victoria-s-secret-to-temporarily-close-online-portal\/\"  data-wpil-monitor-id=\"55574\">forces the PCM to close<\/a> and reset the session index, creating a race condition. The function `exploitMemoryCorruption()` represents the attacker <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-0467-kernel-memory-exploit-in-guest-vms\/\"  data-wpil-monitor-id=\"40413\">exploiting the resulting memory<\/a> corruption.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The recommended mitigation <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46658-critical-security-vulnerability-in-exonautweb-s-4c-strategies-exonaut-21-6\/\"  data-wpil-monitor-id=\"82512\">strategy for this vulnerability<\/a> is to apply the vendor patch. If the patch is not available or cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation strategy. These tools can monitor the system for any unusual behavior and block or alert about any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28169-unencrypted-broadcasts-lead-to-potential-man-in-the-middle-attacks-on-byd-qin-plus-dm-i-dilink-os\/\"  data-wpil-monitor-id=\"40639\">potential attacks<\/a>. However, these are just temporary measures and cannot replace the need for the vendor patch. Regular updates and patches are <a href=\"https:\/\/www.ameeba.com\/blog\/uh-cybersecurity-camps-a-crucial-step-towards-securing-our-digital-future\/\"  data-wpil-monitor-id=\"39784\">crucial in maintaining robust cybersecurity<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview This blog post aims to shed light on an intricate vulnerability, CVE-2023-33110, that has been identified in the PCM host voice audio driver. This vulnerability has widespread implications, as it affects any system that utilizes this driver for audio functionalities. The severity of this problem lies in its potential to cause memory corruption, which [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-34366","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=34366"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34366\/revisions"}],"predecessor-version":[{"id":75031,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34366\/revisions\/75031"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=34366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=34366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=34366"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=34366"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=34366"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=34366"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=34366"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=34366"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=34366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}