{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98741", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.367Z", "datePublished": "2026-10-18T15:47:26.283Z", "dateUpdated": "2026-10-30T12:39:15.151Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:15.151Z"}, "descriptions": [{"lang": "en", "value": "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)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/usb/misc/ua101.c"], "versions": [{"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "b54976c81a6b8cae311b75be1a4cda444689bca0", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "0a6a5eecc92c13f936d8d90975116d6bbdf4f876", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "ada5ded765f059a6e3036e69ca350449442af0fc", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "fd3a7bf0d988b0878a1957df150edb35f81db87e", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "eb0c7fda59cf650076f8ed5b949a6c8441aa3606", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "4294fe57048594a9e158b61c967bb7f943cda477", "status": "affected", "versionType": "git"}, {"version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "lessThan": "86f86e6fdedc33c5b8d38b9208b350f8accf57ee", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/usb/misc/ua101.c"], "versions": [{"version": "2.6.34", "status": "affected"}, {"version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b54976c81a6b8cae311b75be1a4cda444689bca0"}, {"url": "https://git.kernel.org/stable/c/a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d"}, {"url": "https://git.kernel.org/stable/c/0a6a5eecc92c13f936d8d90975116d6bbdf4f876"}, {"url": "https://git.kernel.org/stable/c/ada5ded765f059a6e3036e69ca350449442af0fc"}, {"url": "https://git.kernel.org/stable/c/fd3a7bf0d988b0878a1957df150edb35f81db87e"}, {"url": "https://git.kernel.org/stable/c/eb0c7fda59cf650076f8ed5b949a6c8441aa3606"}, {"url": "https://git.kernel.org/stable/c/4294fe57048594a9e158b61c967bb7f943cda477"}, {"url": "https://git.kernel.org/stable/c/86f86e6fdedc33c5b8d38b9208b350f8accf57ee"}], "title": "ALSA: ua101: reject mismatched capture/playback packet sizes", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/usb/misc/ua101.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b54976c81a6b8cae311b75be1a4cda444689bca0", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "0a6a5eecc92c13f936d8d90975116d6bbdf4f876", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "ada5ded765f059a6e3036e69ca350449442af0fc", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "fd3a7bf0d988b0878a1957df150edb35f81db87e", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "eb0c7fda59cf650076f8ed5b949a6c8441aa3606", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "4294fe57048594a9e158b61c967bb7f943cda477", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}, {"lessThan": "86f86e6fdedc33c5b8d38b9208b350f8accf57ee", "status": "affected", "version": "63978ab3e3e963db28093b53bb4598f2702e1ad7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/usb/misc/ua101.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.34"}, {"lessThan": "2.6.34", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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)"}], "id": "CVE-2026-98741", "lastModified": "2026-10-30T13:21:22.713", "metrics": {}, "published": "2026-10-18T16:17:27.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a6a5eecc92c13f936d8d90975116d6bbdf4f876"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4294fe57048594a9e158b61c967bb7f943cda477"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86f86e6fdedc33c5b8d38b9208b350f8accf57ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a2d326b3f6d470ea4bfde00245794e0dc6dbbc3d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ada5ded765f059a6e3036e69ca350449442af0fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b54976c81a6b8cae311b75be1a4cda444689bca0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eb0c7fda59cf650076f8ed5b949a6c8441aa3606"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd3a7bf0d988b0878a1957df150edb35f81db87e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ALSA: ua101: reject mismatched capture/playback packet sizes", "id": "2555081", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555081"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nALSA: ua101: reject mismatched capture/playback packet sizes\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.\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.\nReject such descriptors at probe time. Genuine UA-101/UA-1000 hardware\ndeclares proportional packet sizes and is unaffected.\nBUG: KASAN: slab-out-of-bounds in start_usb_playback (sound/usb/misc/ua101.c:586)\nWrite of size 2048 at addr ffff8881098f3c00 by task exploit/5021\nCall Trace:\n__asan_memset (mm/kasan/shadow.c:84)\nstart_usb_playback (sound/usb/misc/ua101.c:586)\nplayback_pcm_open (sound/usb/misc/ua101.c:679)\nsnd_pcm_open_substream (sound/core/pcm_native.c:2829)\nsnd_pcm_open (sound/core/pcm_native.c:2865 sound/core/pcm_native.c:2932)\nsnd_pcm_playback_open (sound/core/pcm_native.c:2891)\nsnd_open (sound/core/sound.c:166)\nchrdev_open (fs/char_dev.c:411)\ndo_dentry_open (fs/open.c:996)\nvfs_open (fs/open.c:1101)\npath_openat (fs/namei.c:4837 fs/namei.c:5000)\ndo_file_open (fs/namei.c:5029)\ndo_sys_openat2 (fs/open.c:1417)\n__x64_sys_openat (fs/open.c:1423 fs/open.c:1439 fs/open.c:1434)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\nThe buggy address belongs to the object at ffff8881098f3c00\nwhich belongs to the cache kmalloc-192 of size 192\nThe buggy address is located 0 bytes inside of\nallocated 168-byte region [ffff8881098f3c00, ffff8881098f3ca8)", "A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) UA-101 USB audio driver. The driver does not validate that packet sizes and channel numbers match between capture and playback endpoints during device initialization. An attacker who connects a specially crafted USB device can trigger an out-of-bounds memory write past the playback buffer. This vulnerability can lead to a denial of service (DoS) through a kernel crash or potentially allow arbitrary code execution with kernel privileges."], "name": "CVE-2026-98741", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98741\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98741\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98741.mbox"], "threat_severity": "Important"}