{"id":"CVE-2025-38249","title":"ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()\n\nIn snd_usb_get_audioformat_uac3(), the length value returned from\nsnd_usb_ctl_msg() is used d…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 24ff7d465c4284529bbfa207757bffb6f44b6403","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 2dc1c3edf67abd30c757f8054a5da61927cdda21","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < c3fb926abe90d86f5e3055e0035f04d9892a118b","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 6eb211788e1370af52a245d4d7da35c374c7b401","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 74fcb3852a2f579151ce80b9ed96cd916ba0d5d8","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 0ee87c2814deb5e42921281116ac3abcb326880b","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 11e740dc1a2c8590eb7074b5c4ab921bb6224c36","Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a","Linux 4.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:52:13.078613Z"},"published":"2025-07-09","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:28.997Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38249","references":[{"url":"https://git.kernel.org/stable/c/24ff7d465c4284529bbfa207757bffb6f44b6403"},{"url":"https://git.kernel.org/stable/c/2dc1c3edf67abd30c757f8054a5da61927cdda21"},{"url":"https://git.kernel.org/stable/c/c3fb926abe90d86f5e3055e0035f04d9892a118b"},{"url":"https://git.kernel.org/stable/c/6eb211788e1370af52a245d4d7da35c374c7b401"},{"url":"https://git.kernel.org/stable/c/74fcb3852a2f579151ce80b9ed96cd916ba0d5d8"},{"url":"https://git.kernel.org/stable/c/0ee87c2814deb5e42921281116ac3abcb326880b"},{"url":"https://git.kernel.org/stable/c/11e740dc1a2c8590eb7074b5c4ab921bb6224c36"},{"url":"https://git.kernel.org/stable/c/fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a"}],"tags":["cve.org"],"epss":0.00184,"epssPercentile":0.08037,"ingestedAt":"2026-11-05T22:38:31.942Z","slug":"CVE-2025-38249","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()\n\nIn snd_usb_get_audioformat_uac3(), the length value returned from\nsnd_usb_ctl_msg() is used directly for memory allocation without\nvalidation. This length is controlled by the USB device.\n\nThe allocated buffer is cast to a uac3_cluster_header_descriptor\nand its fields are accessed without verifying that the buffer\nis large enough. If the device returns a smaller than expected\nlength, this leads to an out-of-bounds read.\n\nAdd a length check to ensure the buffer is large enough for\nuac3_cluster_header_descriptor.\n\n## Affected\n\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 24ff7d465c4284529bbfa207757bffb6f44b6403`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 2dc1c3edf67abd30c757f8054a5da61927cdda21`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < c3fb926abe90d86f5e3055e0035f04d9892a118b`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 6eb211788e1370af52a245d4d7da35c374c7b401`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 74fcb3852a2f579151ce80b9ed96cd916ba0d5d8`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 0ee87c2814deb5e42921281116ac3abcb326880b`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < 11e740dc1a2c8590eb7074b5c4ab921bb6224c36`\n- `Linux >= 9a2fe9b801f585baccf8352d82839dcd54b300cf < fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a`\n- `Linux 4.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}