CVE-2026-98836

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98836", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.372Z", "datePublished": "2026-10-18T15:49:51.823Z", "dateUpdated": "2026-10-30T12:40:05.522Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:05.522Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: line6: reject oversized playback packets\n\nEach playback URB is handed a slice of out.buffer that is exactly\nLINE6_ISO_PACKETS * max_packet_size_out bytes, sized from the OUT\nendpoint, but the number of bytes written into that slice is never\ncompared against it.\n\nsubmit_audio_out_urb() takes the frame count from prev_fsize, which\naudio_in_callback() derived from the *IN* endpoint's received packet\nlength, and rescales it with the playback frame size; when prev_fsize is\nstill zero it synthesizes a length from the sample rate instead. On a\ndevice declaring a large IN wMaxPacketSize and a small OUT\nwMaxPacketSize, the resulting memcpy(), or the memset() when the\nplayback stream is idle, runs past its slice and, as the reproducer\nbelow shows, beyond the allocation.\n\nusb_submit_urb() is not a backstop. max_packet_size_out comes from\nusb_maxpacket(), which returns only the low 11 bits of wMaxPacketSize,\nwhile USB core validates a high-speed isochronous length against that\nbase scaled by usb_endpoint_maxp_mult(). A length of up to three times\nthe allocated slice is therefore accepted, and even a rejected URB is\nonly rejected after the write.\n\nReject a packet that does not fit the slice the driver allocated for it.\nClamping it instead would silently shorten the capture-derived rate\nfeedback and desynchronize the two streams.\n\n BUG: KASAN: slab-out-of-bounds in submit_audio_out_urb (sound/usb/line6/playback.c:229)\n Write of size 1024 at addr ffff888100bbd400 by task kworker/1:2/5002\n Workqueue: events line6_startup_work\n Call Trace:\n __asan_memcpy (mm/kasan/shadow.c:106)\n submit_audio_out_urb (sound/usb/line6/playback.c:229)\n line6_submit_audio_out_all_urbs (sound/usb/line6/playback.c:291)\n line6_stream_start (sound/usb/line6/pcm.c:194)\n line6_pcm_acquire (sound/usb/line6/pcm.c:337)\n line6_startup_work (sound/usb/line6/driver.c:728)\n process_one_work (kernel/workqueue.c:3396)\n worker_thread (kernel/workqueue.c:3479 kernel/workqueue.c:3560)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:158)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n\n The buggy address belongs to the object at ffff888100bbd400\n which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 0 bytes inside of\n allocated 256-byte region [ffff888100bbd400, ffff888100bbd500)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/usb/line6/playback.c"], "versions": [{"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "48c76820dd8858ce60a6e42519141ebcf3dfeebf", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "7f31587e26e1d4735924bc324e7fa506d85de150", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "e3b68b1d92f279e203923dc8bf45c8860e5b5985", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "933d8ac23388eb208ea195231d682dce0bec86ca", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "a84371be89c39ccc46c7af8b9eb15c448df9265f", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "3f75da1e4ee699f6650d23d6897cf443b01856c7", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "b78748424f29f07d310484b2b36afdececa74389", "status": "affected", "versionType": "git"}, {"version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "lessThan": "61b0a5a114fa4552892da5c0ff2f42e63bf08c6b", "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/line6/playback.c"], "versions": [{"version": "4.9", "status": "affected"}, {"version": "0", "lessThan": "4.9", "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": "4.9", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/48c76820dd8858ce60a6e42519141ebcf3dfeebf"}, {"url": "https://git.kernel.org/stable/c/7f31587e26e1d4735924bc324e7fa506d85de150"}, {"url": "https://git.kernel.org/stable/c/e3b68b1d92f279e203923dc8bf45c8860e5b5985"}, {"url": "https://git.kernel.org/stable/c/933d8ac23388eb208ea195231d682dce0bec86ca"}, {"url": "https://git.kernel.org/stable/c/a84371be89c39ccc46c7af8b9eb15c448df9265f"}, {"url": "https://git.kernel.org/stable/c/3f75da1e4ee699f6650d23d6897cf443b01856c7"}, {"url": "https://git.kernel.org/stable/c/b78748424f29f07d310484b2b36afdececa74389"}, {"url": "https://git.kernel.org/stable/c/61b0a5a114fa4552892da5c0ff2f42e63bf08c6b"}], "title": "ALSA: line6: reject oversized playback packets", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/usb/line6/playback.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "48c76820dd8858ce60a6e42519141ebcf3dfeebf", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "7f31587e26e1d4735924bc324e7fa506d85de150", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "e3b68b1d92f279e203923dc8bf45c8860e5b5985", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "933d8ac23388eb208ea195231d682dce0bec86ca", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "a84371be89c39ccc46c7af8b9eb15c448df9265f", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "3f75da1e4ee699f6650d23d6897cf443b01856c7", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "b78748424f29f07d310484b2b36afdececa74389", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}, {"lessThan": "61b0a5a114fa4552892da5c0ff2f42e63bf08c6b", "status": "affected", "version": "7a0f55aeeb8f1fa32a119d34ddfefc6100936692", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/usb/line6/playback.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"lessThan": "4.9", "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: line6: reject oversized playback packets\n\nEach playback URB is handed a slice of out.buffer that is exactly\nLINE6_ISO_PACKETS * max_packet_size_out bytes, sized from the OUT\nendpoint, but the number of bytes written into that slice is never\ncompared against it.\n\nsubmit_audio_out_urb() takes the frame count from prev_fsize, which\naudio_in_callback() derived from the *IN* endpoint's received packet\nlength, and rescales it with the playback frame size; when prev_fsize is\nstill zero it synthesizes a length from the sample rate instead. On a\ndevice declaring a large IN wMaxPacketSize and a small OUT\nwMaxPacketSize, the resulting memcpy(), or the memset() when the\nplayback stream is idle, runs past its slice and, as the reproducer\nbelow shows, beyond the allocation.\n\nusb_submit_urb() is not a backstop. max_packet_size_out comes from\nusb_maxpacket(), which returns only the low 11 bits of wMaxPacketSize,\nwhile USB core validates a high-speed isochronous length against that\nbase scaled by usb_endpoint_maxp_mult(). A length of up to three times\nthe allocated slice is therefore accepted, and even a rejected URB is\nonly rejected after the write.\n\nReject a packet that does not fit the slice the driver allocated for it.\nClamping it instead would silently shorten the capture-derived rate\nfeedback and desynchronize the two streams.\n\n BUG: KASAN: slab-out-of-bounds in submit_audio_out_urb (sound/usb/line6/playback.c:229)\n Write of size 1024 at addr ffff888100bbd400 by task kworker/1:2/5002\n Workqueue: events line6_startup_work\n Call Trace:\n __asan_memcpy (mm/kasan/shadow.c:106)\n submit_audio_out_urb (sound/usb/line6/playback.c:229)\n line6_submit_audio_out_all_urbs (sound/usb/line6/playback.c:291)\n line6_stream_start (sound/usb/line6/pcm.c:194)\n line6_pcm_acquire (sound/usb/line6/pcm.c:337)\n line6_startup_work (sound/usb/line6/driver.c:728)\n process_one_work (kernel/workqueue.c:3396)\n worker_thread (kernel/workqueue.c:3479 kernel/workqueue.c:3560)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:158)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n\n The buggy address belongs to the object at ffff888100bbd400\n which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 0 bytes inside of\n allocated 256-byte region [ffff888100bbd400, ffff888100bbd500)"}], "id": "CVE-2026-98836", "lastModified": "2026-10-30T13:21:29.780", "metrics": {}, "published": "2026-10-18T16:17:37.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f75da1e4ee699f6650d23d6897cf443b01856c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48c76820dd8858ce60a6e42519141ebcf3dfeebf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61b0a5a114fa4552892da5c0ff2f42e63bf08c6b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f31587e26e1d4735924bc324e7fa506d85de150"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/933d8ac23388eb208ea195231d682dce0bec86ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a84371be89c39ccc46c7af8b9eb15c448df9265f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b78748424f29f07d310484b2b36afdececa74389"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3b68b1d92f279e203923dc8bf45c8860e5b5985"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ALSA: line6: reject oversized playback packets", "id": "2555225", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555225"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) Line 6 USB audio driver. The driver fails to validate the size of playback packets against the allocated memory buffer slice when handling asymmetrical audio configurations. An attacker capable of connecting a crafted USB device could exploit this vulnerability to cause an out-of-bounds memory write. This issue can lead to kernel memory corruption or a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98836", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "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-2026-98836\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98836\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98836.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a0f55aeeb8f1fa32a119d34ddfefc6100936692,a84371be89c39ccc46c7af8b9eb15c448df9265f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a0f55aeeb8f1fa32a119d34ddfefc6100936692,3f75da1e4ee699f6650d23d6897cf443b01856c7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a0f55aeeb8f1fa32a119d34ddfefc6100936692,b78748424f29f07d310484b2b36afdececa74389)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a0f55aeeb8f1fa32a119d34ddfefc6100936692,61b0a5a114fa4552892da5c0ff2f42e63bf08c6b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T21:15:14.283889+00:00", "updated": "2026-10-24T02:15:17.496522+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}