{"id":"CVE-2026-98741","aliases":[],"cve":{"records":[{"id":"CVE-2026-98741","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.367Z","published":"2026-10-18T15:47:26.283Z","modified":"2026-10-30T12:39:15.151Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:39:15.151Z"}],"references":[{"url":"https://git.kernel.org/stable/c/b54976c81a6b8cae311b75be1a4cda444689bca0","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/0a6a5eecc92c13f936d8d90975116d6bbdf4f876","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/ada5ded765f059a6e3036e69ca350449442af0fc","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/fd3a7bf0d988b0878a1957df150edb35f81db87e","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/eb0c7fda59cf650076f8ed5b949a6c8441aa3606","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/4294fe57048594a9e158b61c967bb7f943cda477","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/86f86e6fdedc33c5b8d38b9208b350f8accf57ee","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"ALSA: ua101: reject mismatched capture/playback packet sizes","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ua101: reject mismatched capture/playback packet sizes\n\ndetect_usb_format() cross-checks bSubframeSize, bBitResolution and\ntSamFreq between the capture and playback interfaces, but never relates\nthe two endpoints' wMaxPacketSize and bNrChannels.  Each playback URB\ngets a buffer of ua->playback.max_packet_bytes, while the number of\nbytes written into it is derived from the capture stream:\ncapture_urb_complete() computes frames from the received capture packet\nand capture.frame_bytes, and start_usb_playback() and playback_work()\nmultiply that by playback.frame_bytes.\n\nA device declaring a large capture wMaxPacketSize with few capture\nchannels and a small playback wMaxPacketSize with many playback channels\ntherefore memset()s and memcpy()s past the end of the playback buffer,\nin open() of the PCM node the driver registers during probe.\nusb_submit_urb() rejects the over-long iso_frame_desc[0].length with\n-EMSGSIZE, but only after the write.\n\nReject such descriptors at probe time.  Genuine UA-101/UA-1000 hardware\ndeclares proportional packet sizes and is unaffected.\n\n  BUG: KASAN: slab-out-of-bounds in start_usb_playback (sound/usb/misc/ua101.c:586)\n  Write of size 2048 at addr ffff8881098f3c00 by task exploit/5021\n  Call Trace:\n   __asan_memset (mm/kasan/shadow.c:84)\n   start_usb_playback (sound/usb/misc/ua101.c:586)\n   playback_pcm_open (sound/usb/misc/ua101.c:679)\n   snd_pcm_open_substream (sound/core/pcm_native.c:2829)\n   snd_pcm_open (sound/core/pcm_native.c:2865 sound/core/pcm_native.c:2932)\n   snd_pcm_playback_open (sound/core/pcm_native.c:2891)\n   snd_open (sound/core/sound.c:166)\n   chrdev_open (fs/char_dev.c:411)\n   do_dentry_open (fs/open.c:996)\n   vfs_open (fs/open.c:1101)\n   path_openat (fs/namei.c:4837 fs/namei.c:5000)\n   do_file_open (fs/namei.c:5029)\n   do_sys_openat2 (fs/open.c:1417)\n   __x64_sys_openat (fs/open.c:1423 fs/open.c:1439 fs/open.c:1434)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\n  The buggy address belongs to the object at ffff8881098f3c00\n   which belongs to the cache kmalloc-192 of size 192\n  The buggy address is located 0 bytes inside of\n   allocated 168-byte region [ffff8881098f3c00, ffff8881098f3ca8)","score":null,"severity":"unknown","published":"2026-10-18T15:47:26.283Z","modified":"2026-10-30T12:39:15.151Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"b54976c81a6b8cae311b75be1a4cda444689bca0","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"0a6a5eecc92c13f936d8d90975116d6bbdf4f876","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"ada5ded765f059a6e3036e69ca350449442af0fc","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"fd3a7bf0d988b0878a1957df150edb35f81db87e","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"eb0c7fda59cf650076f8ed5b949a6c8441aa3606","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"4294fe57048594a9e158b61c967bb7f943cda477","versionType":"git"},{"version":"63978ab3e3e963db28093b53bb4598f2702e1ad7","status":"affected","lessThan":"86f86e6fdedc33c5b8d38b9208b350f8accf57ee","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98741"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98741"}],"remediation":[],"references":["https://git.kernel.org/stable/c/b54976c81a6b8cae311b75be1a4cda444689bca0","https://git.kernel.org/stable/c/a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d","https://git.kernel.org/stable/c/0a6a5eecc92c13f936d8d90975116d6bbdf4f876","https://git.kernel.org/stable/c/ada5ded765f059a6e3036e69ca350449442af0fc","https://git.kernel.org/stable/c/fd3a7bf0d988b0878a1957df150edb35f81db87e","https://git.kernel.org/stable/c/eb0c7fda59cf650076f8ed5b949a6c8441aa3606","https://git.kernel.org/stable/c/4294fe57048594a9e158b61c967bb7f943cda477","https://git.kernel.org/stable/c/86f86e6fdedc33c5b8d38b9208b350f8accf57ee"],"sources":[{"name":"CVE","id":"CVE-2026-98741","modified":"2026-10-30T12:39:15.151Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98741"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T14:04:42.912Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:05:31.288Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}