{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Prevent excessive number of frames\n\nIn this case, the user constructed the parameters with maxpacksize 40\nfor rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer\nsize for each data URB is maxpacksize * packets, which in this example\nis 40 * 6 = 240; When the user performs a write operation to send audio\ndata into the ALSA PCM playback stream, the calculated number of frames\nis packsize[0] * packets = 264, which exceeds the allocated URB buffer\nsize, triggering the out-of-bounds (OOB) issue reported by syzbot [1].\n\nAdded a check for the number of single data URB frames when calculating\nthe number of frames to prevent [1].\n\n[1]\nBUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\nWrite of size 264 at addr ffff88804337e800 by task syz.0.17/5506\nCall Trace:\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23208" }, { "summary":"CVE-2026-23208 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-23208.json" }, { "summary":"openEuler-SA-2026-1760", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1760" }, { "summary":"CVE-2026-23208", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-23208&packageName=kernel" } ], "title":"openEuler cve CVE-2026-23208", "tracking":{ "initial_release_date":"2026-03-30T15:49:29+08:00", "revision_history":[ { "date":"2026-03-30T15:49:29+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-03-30T15:49:29+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-03-30T15:49:29+08:00", "id":"CVE-2026-23208", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { 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The buffer\nsize for each data URB is maxpacksize * packets, which in this example\nis 40 * 6 = 240; When the user performs a write operation to send audio\ndata into the ALSA PCM playback stream, the calculated number of frames\nis packsize[0] * packets = 264, which exceeds the allocated URB buffer\nsize, triggering the out-of-bounds (OOB) issue reported by syzbot [1].\n\nAdded a check for the number of single data URB frames when calculating\nthe number of frames to prevent [1].\n\n[1]\nBUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\nWrite of size 264 at addr ffff88804337e800 by task syz.0.17/5506\nCall Trace:\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1760" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.8, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-23208" } ] }