CVE-2026-31581In 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 (vi…
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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.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | before 6.6.136; from 6.12 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1 | NVD |
References
- https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65patch
- https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185patch
- https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0patch
- https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386patch
- https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41
- https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5cpatch
- https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3
- https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af
- https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00epatch
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.