{"document":{"aggregate_severity":{"namespace":"https://access.redhat.com/security/updates/classification/","text":"Moderate"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright © Red Hat, Inc. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"legal_disclaimer","text":"This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.","title":"Terms of Use"}],"publisher":{"category":"vendor","contact_details":"https://access.redhat.com/security/team/contact/","issuing_authority":"Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.","name":"Red Hat Product Security","namespace":"https://www.redhat.com"},"references":[{"category":"self","summary":"Canonical URL","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56109.json"}],"title":"alsa-lib: ALSA library: Double-free vulnerability leading to memory corruption","tracking":{"current_release_date":"2026-08-18T17:22:59+00:00","generator":{"date":"2026-08-18T17:22:59+00:00","engine":{"name":"Red Hat 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This double-free vulnerability, located in the `parse_def()` function, allows a local attacker to corrupt memory by providing specially crafted ALSA configuration text. When processing nested configuration blocks, the library attempts to free an already freed memory node. This can lead to system instability, crashes, or a denial of service (DoS).","title":"Vulnerability description"},{"category":"summary","text":"alsa-lib: ALSA library: Double-free vulnerability leading to memory corruption","title":"Vulnerability summary"},{"category":"general","text":"The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.","title":"CVSS score applicability"}],"product_status":{"fixed":["Red Hat Hardened Images:alsa-lib-main@aarch64","Red Hat Hardened Images:alsa-lib-main@noarch","Red Hat Hardened Images:alsa-lib-main@src","Red Hat Hardened 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details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/","product_ids":["Red Hat Hardened Images:alsa-lib-main@aarch64","Red Hat Hardened Images:alsa-lib-main@noarch","Red Hat Hardened Images:alsa-lib-main@src","Red Hat Hardened Images:alsa-lib-main@x86_64"],"url":"https://access.redhat.com/errata/RHSA-2026:40573"},{"category":"workaround","details":"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.","product_ids":["Red Hat Hardened Images:alsa-lib-main@aarch64","Red Hat Hardened Images:alsa-lib-main@noarch","Red Hat Hardened Images:alsa-lib-main@src","Red Hat Hardened 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