cbcvebase.
CVE-2021-46968
published 2024-02-27

CVE-2021-46968: In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix zcard and zqueue hot-unplug memleak Tests with kvm and a kmemdebug kernel…

PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
12.8th percentile
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix zcard and zqueue hot-unplug memleak Tests with kvm and a kmemdebug kernel showed, that on hot unplug the zcard and zqueue structs for the unplugged card or queue are not properly freed because of a mismatch with get/put for the embedded kref counter. This fix now adjusts the handling of the kref counters. With init the kref counter starts with 1. This initial value needs to drop to zero with the unregister of the card or queue to trigger the release and free the object.

Affected

13 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.10.38-1 (bookworm)linux 5.10.38-1 (bookworm)
linuxlinux——
linuxlinux>= 29c2680fd2bf3862ff5cf2957f198512493156f9 < 026499a9c2e002e621ad568d1378324ae97e5524026499a9c2e002e621ad568d1378324ae97e5524
linuxlinux>= 29c2680fd2bf3862ff5cf2957f198512493156f9 < 055a063a18bcd19b93709e3eac8078d6b2f04599055a063a18bcd19b93709e3eac8078d6b2f04599
linuxlinux>= 29c2680fd2bf3862ff5cf2957f198512493156f9 < 971dc8706cee47393d393905d294ea47e39503d3971dc8706cee47393d393905d294ea47e39503d3
linuxlinux>= 29c2680fd2bf3862ff5cf2957f198512493156f9 < 70fac8088cfad9f3b379c9082832b4d7532c16c270fac8088cfad9f3b379c9082832b4d7532c16c2
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 5.10 < 5.10.365.10.36
linuxlinux_kernel>= 5.11 < 5.11.205.11.20
linuxlinux_kernel>= 5.12 < 5.12.35.12.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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