Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.9%
CVSS Severity
CVSS v3 Score 5.5
References
- https://git.kernel.org/stable/c/026499a9c2e002e621ad568d1378324ae97e5524
- https://git.kernel.org/stable/c/055a063a18bcd19b93709e3eac8078d6b2f04599
- https://git.kernel.org/stable/c/70fac8088cfad9f3b379c9082832b4d7532c16c2
- https://git.kernel.org/stable/c/971dc8706cee47393d393905d294ea47e39503d3
- https://git.kernel.org/stable/c/026499a9c2e002e621ad568d1378324ae97e5524
- https://git.kernel.org/stable/c/055a063a18bcd19b93709e3eac8078d6b2f04599
- https://git.kernel.org/stable/c/70fac8088cfad9f3b379c9082832b4d7532c16c2
- https://git.kernel.org/stable/c/971dc8706cee47393d393905d294ea47e39503d3
Products affected by CVE-2021-46968
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cpe:2.3:o:linux:linux_kernel:5.10
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cpe:2.3:o:linux:linux_kernel:5.10.0
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cpe:2.3:o:linux:linux_kernel:5.10.1
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cpe:2.3:o:linux:linux_kernel:5.10.10
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cpe:2.3:o:linux:linux_kernel:5.10.11
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cpe:2.3:o:linux:linux_kernel:5.10.12
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cpe:2.3:o:linux:linux_kernel:5.10.13
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cpe:2.3:o:linux:linux_kernel:5.10.14
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cpe:2.3:o:linux:linux_kernel:5.10.15
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cpe:2.3:o:linux:linux_kernel:5.10.16
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cpe:2.3:o:linux:linux_kernel:5.10.17
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cpe:2.3:o:linux:linux_kernel:5.10.18
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cpe:2.3:o:linux:linux_kernel:5.10.19
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cpe:2.3:o:linux:linux_kernel:5.10.2
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cpe:2.3:o:linux:linux_kernel:5.10.20
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cpe:2.3:o:linux:linux_kernel:5.10.21
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cpe:2.3:o:linux:linux_kernel:5.10.22
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cpe:2.3:o:linux:linux_kernel:5.10.23
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cpe:2.3:o:linux:linux_kernel:5.10.24
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cpe:2.3:o:linux:linux_kernel:5.10.25
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cpe:2.3:o:linux:linux_kernel:5.10.26
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cpe:2.3:o:linux:linux_kernel:5.10.27
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cpe:2.3:o:linux:linux_kernel:5.10.28
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cpe:2.3:o:linux:linux_kernel:5.10.29
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cpe:2.3:o:linux:linux_kernel:5.10.3
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cpe:2.3:o:linux:linux_kernel:5.10.30
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cpe:2.3:o:linux:linux_kernel:5.10.31
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cpe:2.3:o:linux:linux_kernel:5.10.32
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cpe:2.3:o:linux:linux_kernel:5.10.33
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cpe:2.3:o:linux:linux_kernel:5.10.34
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cpe:2.3:o:linux:linux_kernel:5.10.35
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cpe:2.3:o:linux:linux_kernel:5.10.4
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cpe:2.3:o:linux:linux_kernel:5.10.5
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cpe:2.3:o:linux:linux_kernel:5.10.6
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cpe:2.3:o:linux:linux_kernel:5.10.7
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cpe:2.3:o:linux:linux_kernel:5.10.8
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cpe:2.3:o:linux:linux_kernel:5.10.9
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cpe:2.3:o:linux:linux_kernel:5.11
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cpe:2.3:o:linux:linux_kernel:5.11.1
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cpe:2.3:o:linux:linux_kernel:5.11.10
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cpe:2.3:o:linux:linux_kernel:5.11.11
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cpe:2.3:o:linux:linux_kernel:5.11.12
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cpe:2.3:o:linux:linux_kernel:5.11.13
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cpe:2.3:o:linux:linux_kernel:5.11.14
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cpe:2.3:o:linux:linux_kernel:5.11.15
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cpe:2.3:o:linux:linux_kernel:5.11.16
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cpe:2.3:o:linux:linux_kernel:5.11.17
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cpe:2.3:o:linux:linux_kernel:5.11.18
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cpe:2.3:o:linux:linux_kernel:5.11.19
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cpe:2.3:o:linux:linux_kernel:5.11.2
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cpe:2.3:o:linux:linux_kernel:5.11.3
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cpe:2.3:o:linux:linux_kernel:5.11.4
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cpe:2.3:o:linux:linux_kernel:5.11.5
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cpe:2.3:o:linux:linux_kernel:5.11.6
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cpe:2.3:o:linux:linux_kernel:5.11.7
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cpe:2.3:o:linux:linux_kernel:5.11.8
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cpe:2.3:o:linux:linux_kernel:5.11.9
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cpe:2.3:o:linux:linux_kernel:5.12
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cpe:2.3:o:linux:linux_kernel:5.12.1
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cpe:2.3:o:linux:linux_kernel:5.12.2