Not yet scoredPublished Sep 25, 2026

CVE-2026-98006ALSA: caiaq: Decoupling ep1_in_urb in caiaq dev

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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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

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before a3bbd2845bc7188ae18548a591da1067af997e80; from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before fbfbad728da2e95d6560e43266895de5c8e844b3; from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before dbd3effcbdb85394d3c4bd5ee9df785a44303333; from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before 671037b282eb7fe477136bd0130ffd9029eb8668; from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before d6dd3c915b0d02457711d8fbaa60efc52144557f; 523f1dce37434a9a6623bf46e7893e2b4b10ac3c builds before 0c1b907d5db2f3508375776e5b78d69591aa5626; from 523f1dce37434a9a6623bf46e7893e2b4b10ac3c before d41e6c1533f09b27fc562260d41417490d2b6084; 523f1dce37434a9a6623bf46e7893e2b4b10ac3c builds before 402a9d6aab7ac787ab075adeb562c3db8b8f564b	CNA record

References

References

https://git.kernel.org/stable/c/a3bbd2845bc7188ae18548a591da1067af997e80
https://git.kernel.org/stable/c/fbfbad728da2e95d6560e43266895de5c8e844b3
https://git.kernel.org/stable/c/dbd3effcbdb85394d3c4bd5ee9df785a44303333
https://git.kernel.org/stable/c/671037b282eb7fe477136bd0130ffd9029eb8668
https://git.kernel.org/stable/c/d6dd3c915b0d02457711d8fbaa60efc52144557f
https://git.kernel.org/stable/c/0c1b907d5db2f3508375776e5b78d69591aa5626
https://git.kernel.org/stable/c/d41e6c1533f09b27fc562260d41417490d2b6084
https://git.kernel.org/stable/c/402a9d6aab7ac787ab075adeb562c3db8b8f564b

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.