{"cve":{"cve_id":"CVE-2026-53193","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: timer: Forcibly close timer instances at closing\n\nWhen snd_timer object is freed via snd_timer_free() and still pending\nsnd_timer_instance objects are assigned to the timer object, it tries\nto unlink all instances and just set NULL to each ti->timer, then\nreleases the resources immediately.  The problem is, however, when\nthere are slave timer instances that are associated with a master\ninstance linked to this timer: namely, those slave instances still\npoint to the freed timer object although the master instance is\nunlinked, which may lead to user-after-free.  The bug can be easily\ntriggered particularly when a new userspace-driven timers\n(CONFIG_SND_UTIMER) is involved, since it can create and delete the\ntimer object via a simple file open/close, while the other\napplications may keep accessing to that timer.\n\nThis patch is an attempt to paper over the problem above: now instead\nof just unlinking, call snd_timer_close[_locked]() forcibly for each\npending timer instance, so that all assigned slave timer instances are\nproperly detached, too.  Since snd_timer_close() might be called later\nby the driver that created that instance, the check of\nSNDRV_TIMER_IFLG_DEAD is added at the beginning, too.","published_at":"2026-06-25T08:39:04.346000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/586b219a22b1032b28b8bd356b963276c5e5bf53","https://git.kernel.org/stable/c/f46093dd22969037beb1fce2e043f3236be41c92","https://git.kernel.org/stable/c/60e73ab87b84bbd6bd7ddd1d16019a3a3705ab8f","https://git.kernel.org/stable/c/da3039e91d1f835874ed6e9a33ea19ee80c2cb92"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"37745918e0e7575bc40f38da93a99b9fa6406224","version_start_inclusive":true,"version_end":"586b219a22b1032b28b8bd356b963276c5e5bf53","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:37745918e0e7575bc40f38da93a99b9fa6406224:586b219a22b1032b28b8bd356b963276c5e5bf53"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"37745918e0e7575bc40f38da93a99b9fa6406224","version_start_inclusive":true,"version_end":"f46093dd22969037beb1fce2e043f3236be41c92","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:37745918e0e7575bc40f38da93a99b9fa6406224:f46093dd22969037beb1fce2e043f3236be41c92"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"37745918e0e7575bc40f38da93a99b9fa6406224","version_start_inclusive":true,"version_end":"60e73ab87b84bbd6bd7ddd1d16019a3a3705ab8f","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:37745918e0e7575bc40f38da93a99b9fa6406224:60e73ab87b84bbd6bd7ddd1d16019a3a3705ab8f"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"37745918e0e7575bc40f38da93a99b9fa6406224","version_start_inclusive":true,"version_end":"da3039e91d1f835874ed6e9a33ea19ee80c2cb92","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:37745918e0e7575bc40f38da93a99b9fa6406224:da3039e91d1f835874ed6e9a33ea19ee80c2cb92"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12","version_start_inclusive":true,"version_end":"6.12","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12:6.12"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.12","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.12"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.94","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.94:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/586b219a22b1032b28b8bd356b963276c5e5bf53","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/f46093dd22969037beb1fce2e043f3236be41c92","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/60e73ab87b84bbd6bd7ddd1d16019a3a3705ab8f","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/da3039e91d1f835874ed6e9a33ea19ee80c2cb92","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:04.346000Z","label":"CVE published","source":null}]}