Expired Pointer Dereference Affecting kernel-rt-64k-debug-devel package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-CENTOS10-KERNELRT64KDEBUGDEVEL-20223233
- published29 Sept 2026
- disclosed25 Sept 2026
Introduced: 25 Sep 2026
NewCVE-2026-98006 (opens in a new tab)How to fix?
There is no fixed version for Centos:10 kernel-rt-64k-debug-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-64k-debug-devel package and not the kernel-rt-64k-debug-devel package as distributed by Centos.
See How to fix? for Centos:10 relevant fixed versions and status.
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
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2541304
- https://access.redhat.com/security/cve/CVE-2026-98006
- https://git.kernel.org/stable/c/0c1b907d5db2f3508375776e5b78d69591aa5626
- https://git.kernel.org/stable/c/402a9d6aab7ac787ab075adeb562c3db8b8f564b
- https://git.kernel.org/stable/c/d41e6c1533f09b27fc562260d41417490d2b6084
- https://git.kernel.org/stable/c/d6dd3c915b0d02457711d8fbaa60efc52144557f