--- id: CVE-2026-98006 title: |- In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Decoupling ep1_in_urb in caiaq dev The epq_in_urb object belonging to the caiaq device is coupled within the struct snd_usb_caiaqdev summary: |- In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Decoupling ep1_in_urb in caiaq dev The epq_in_urb object belonging to the caiaq device is coupled within the struct snd_usb_caiaqdev. After usb_submit_urb… severity: medium cvss: 5.5 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-825 vendor: Linux product: Linux affected: - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < a3bbd2845bc7188ae18548a591da1067af997e80 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < fbfbad728da2e95d6560e43266895de5c8e844b3 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < dbd3effcbdb85394d3c4bd5ee9df785a44303333 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 671037b282eb7fe477136bd0130ffd9029eb8668 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < d6dd3c915b0d02457711d8fbaa60efc52144557f - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 0c1b907d5db2f3508375776e5b78d69591aa5626 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < d41e6c1533f09b27fc562260d41417490d2b6084 - >- Linux >= 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 402a9d6aab7ac787ab075adeb562c3db8b8f564b - Linux 2.6.22 published: '2026-09-25' updated: '2026-10-03' sourceUpdated: '2026-10-03T11:18:23.490' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98006' references: - url: 'https://git.kernel.org/stable/c/0c1b907d5db2f3508375776e5b78d69591aa5626' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/402a9d6aab7ac787ab075adeb562c3db8b8f564b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/671037b282eb7fe477136bd0130ffd9029eb8668' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/a3bbd2845bc7188ae18548a591da1067af997e80' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d41e6c1533f09b27fc562260d41417490d2b6084' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d6dd3c915b0d02457711d8fbaa60efc52144557f' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/dbd3effcbdb85394d3c4bd5ee9df785a44303333' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/fbfbad728da2e95d6560e43266895de5c8e844b3' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98006.json - url: 'https://access.redhat.com/security/cve/CVE-2026-98006' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541304' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98006' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98006' - url: >- https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98006.mbox tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00177 epssPercentile: 0.07163 cvssSource: vendor ingestedAt: '2026-09-25T11:06:38.861Z' --- ## Overview In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Decoupling ep1_in_urb in caiaq dev The epq_in_urb object belonging to the caiaq device is coupled within the struct snd_usb_caiaqdev. After usb_submit_urb(epq_in_urb, GFP_KERNEL) executes successfully, epq_in_urb is successfully added to the urbp_list queue of the dummy HCD driver (userspace specifies dummy_hcd as the HCD layer driver for the caiaq USB device). When init_card() calls snd_usb_caiaq_send_command() which subsequently fails due to a timeout, and proceeds to call snd_card_free() to release the card, the embedded ep1_in_urb object is also freed. When the dummy HCD driver detects that the URB has been unlinked, it returns the URB (by usb_hcd_giveback_urb()), which triggers [1]. Decouple the ep1_in_urb object from the struct snd_usb_caiaqdev and switch to using a pointer instead. Separately allocate and manage the memory for ep1_in_urb to prevent the release of the snd_card memory object from interfering with it. midi_out_urb has the same issue as ep1_in_urb and is handled in the same way. [1] BUG: KASAN: slab-use-after-free in usb_free_urb+0x24/0x120 drivers/usb/core/urb.c:96 Write of size 4 at addr ffff88803cee1050 by task ktimers/1/29 Call Trace: usb_free_urb+0x24/0x120 drivers/usb/core/urb.c:96 dummy_timer+0xaac/0x4d50 drivers/usb/gadget/udc/dummy_hcd.c:2019 __run_hrtimer kernel/time/hrtimer.c:2067 [inline] __hrtimer_run_queues+0x3eb/0xaf0 kernel/time/hrtimer.c:2124 hrtimer_run_softirq+0x1e1/0x2e0 kernel/time/hrtimer.c:2141 Allocated by task 36: snd_card_new+0x7b/0x110 sound/core/init.c:184 create_card sound/usb/caiaq/device.c:429 [inline] snd_probe+0x236/0x1af0 sound/usb/caiaq/device.c:544 Freed by task 36: snd_card_free_when_closed sound/core/init.c:630 [inline] snd_card_free+0x138/0x1d0 sound/core/init.c:662 snd_probe+0x162b/0x1af0 sound/usb/caiaq/device.c:553 ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98006.json)