{"id":49551,"date":"2025-06-08T04:52:29","date_gmt":"2025-06-08T04:52:29","guid":{"rendered":""},"modified":"2025-09-26T14:05:06","modified_gmt":"2025-09-26T20:05:06","slug":"cve-2022-49842-linux-kernel-use-after-free-vulnerability-in-snd-soc-exit","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2022-49842-linux-kernel-use-after-free-vulnerability-in-snd-soc-exit\/","title":{"rendered":"<strong>CVE-2022-49842: Linux Kernel Use-After-Free Vulnerability in snd_soc_exit()<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2022-49842 vulnerability is a critical use-after-free flaw found in the Linux kernel, specifically within the snd_soc_exit() function of the Advanced Linux Sound Architecture (ALSA) System on a Chip (SoC). Given the widespread use of Linux across various devices and systems, this vulnerability has potential wide-reaching implications. An attacker exploiting this flaw could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41651-critical-system-compromise-due-to-missing-authentication\/\"  data-wpil-monitor-id=\"56046\">compromise system<\/a> integrity or leak sensitive data, thereby posing a significant threat to any system running a vulnerable version of the Linux kernel.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2022-49842<br \/>\nSeverity: High (7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: System compromise or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48383-django-select2-vulnerability-risking-data-leakage-and-unauthorized-access\/\"  data-wpil-monitor-id=\"56106\">data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-864967045\" 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: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\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: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\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: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21879-the-linux-kernel-btrfs-use-after-free-vulnerability\/\"  data-wpil-monitor-id=\"56538\">Linux Kernel<\/a> | Versions prior to the release of the vendor patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21999-use-after-free-vulnerability-in-linux-kernel\/\"  data-wpil-monitor-id=\"56830\">use-after-free vulnerability<\/a> is triggered by a failure within the snd_soc_init() function. Specifically, it fails to correctly handle errors when snd_soc_util_init() fails, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7384-php-object-injection-vulnerability-in-wordpress-plugin-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"79064\">leading to the unregistration of the soc_dummy_dev object<\/a> twice. This results in a use-after-free condition, causing undefined behavior that could be exploited to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48828-arbitrary-php-code-execution-in-vbulletin-via-template-conditionals\/\"  data-wpil-monitor-id=\"55751\">execute arbitrary code<\/a> or leak sensitive information.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2466876423\" 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>While actual exploit code would be complex and highly dependent on the specific system configuration, a conceptual example might involve a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32294-uncontrolled-filename-in-php-program-allows-local-file-inclusion\/\"  data-wpil-monitor-id=\"56213\">local script or program<\/a> that deliberately triggers the snd_soc_util_init() failure, then exploits the resulting use-after-free condition. It could look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\nint main() {\n\/\/ Trigger snd_soc_util_init() failure\ntrigger_snd_soc_util_init_failure();\n\/\/ Exploit the use-after-free condition\nexploit_snd_soc_exit_uaf();\nreturn 0;\n}<\/code><\/pre>\n<p><strong>Impact and Mitigation<\/strong><\/p>\n<p>The impact of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32289-high-severity-php-remote-file-inclusion-vulnerability-in-apustheme-yozi\/\"  data-wpil-monitor-id=\"56045\">vulnerability is severe<\/a>, with a CVSS score of 7.8 indicating a high level of risk. Successful exploitation could lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32309-potential-system-compromise-due-to-remote-file-inclusion-in-php-program\/\"  data-wpil-monitor-id=\"56539\">system compromise<\/a> or data leakage.<br \/>\nAs a mitigation measure, it is recommended to apply the latest vendor patches as soon as they become available. In the absence of a patch, it is advised to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and block <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80008\">potential exploitation<\/a> attempts. Further, it is advisable to practice good cybersecurity hygiene such as segregating networks, maintaining least privilege, and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6791-sql-injection-vulnerability-in-centreon-web-monitoring-event-logs-module\/\"  data-wpil-monitor-id=\"84127\">monitoring system logs<\/a> for any suspicious activity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2022-49842 vulnerability is a critical use-after-free flaw found in the Linux kernel, specifically within the snd_soc_exit() function of the Advanced Linux Sound Architecture (ALSA) System on a Chip (SoC). Given the widespread use of Linux across various devices and systems, this vulnerability has potential wide-reaching implications. An attacker exploiting this flaw could compromise [&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":[88],"product":[95],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-49551","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","product-linux-kernel"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49551","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=49551"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49551\/revisions"}],"predecessor-version":[{"id":76910,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49551\/revisions\/76910"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=49551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=49551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=49551"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=49551"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=49551"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=49551"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=49551"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=49551"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=49551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}