In the Linux kernel, the following vulnerability has been resolved:
ALSA: 6fire: fix use-after-free on disconnect
In usb6fire_chip_abort(), the chip struct is allocated as the card's
private data (via snd_card_new with sizeof(struct sfire_chip)). When
snd_card_free_when_closed() is called and no file handles are open, the
card and embedded chip are freed synchronously. The subsequent
chip->card = NULL write then hits freed slab memory.
Call trace:
usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]
usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182
usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458
...
hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953
Fix by moving the card lifecycle out of usb6fire_chip_abort() and into
usb6fire_chip_disconnect(). The card pointer is saved in a local
before any teardown, snd_card_disconnect() is called first to prevent
new opens, URBs are aborted while chip is still valid, and
snd_card_free_when_closed() is called last so chip is never accessed
after the card may be freed.
References
Configurations
Configuration 1 (hide)
|
History
27 Apr 2026, 20:28
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-416 | |
| References | () https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65 - Patch | |
| References | () https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185 - Patch | |
| References | () https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0 - Patch | |
| References | () https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386 - Patch | |
| References | () https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c - Patch | |
| References | () https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e - Patch |
27 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
27 Apr 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
24 Apr 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-24 15:16
Updated : 2026-04-27 20:28
NVD link : CVE-2026-31581
Mitre link : CVE-2026-31581
CVE.ORG link : CVE-2026-31581
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free