Description
snd_ctl_elem_add in sound/core/control.c in the Linux kernel through 5.6.3 has a count=info->owner line, which later affects a private_size*count multiplication for unspecified "interesting side effects." NOTE: kernel engineers dispute this finding, because it could be relevant only if new callers were added that were unfamiliar with the misuse of the info->owner field to represent data unrelated to the "owner" concept. The existing callers, SNDRV_CTL_IOCTL_ELEM_ADD and SNDRV_CTL_IOCTL_ELEM_REPLACE, have been designed to misuse the info->owner field in a safe way
References (3)
Core 3
Core References
Third Party Advisory x_refsource_misc
https://twitter.com/yabbadabbadrew/status/1248632267028582400
Exploit, Third Party Advisory x_refsource_misc
https://github.com/torvalds/linux/blob/3b2549a3740efb8af0150415737067d87e466c5b/sound/core/control.c#L1434-L1474
Mailing List x_refsource_misc
https://lore.kernel.org/alsa-devel/s5h4ktmlfpx.wl-tiwai%40suse.de/
Scores
CVSS v3
7.8
EPSS
0.0013
EPSS Percentile
31.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
Status
published
Products (1)
linux/linux_kernel
< 5.6.3
Published
Apr 12, 2020
Tracked Since
Feb 18, 2026