Use After Free Affecting kernel-debug-core package, versions <0:4.18.0-372.9.1.el8
Threat Intelligence
EPSS
0.13% (50th
percentile)
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-4267806
- published 28 Jul 2021
- disclosed 2 Oct 2020
Introduced: 2 Oct 2020
CVE-2021-37159 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RHSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
References
- https://security.netapp.com/advisory/ntap-20210819-0003/
- https://access.redhat.com/security/cve/CVE-2021-37159
- https://www.spinics.net/lists/linux-usb/msg202228.html
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://access.redhat.com/errata/RHSA-2022:1988
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://bugzilla.suse.com/show_bug.cgi?id=1188601
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145
CVSS Scores
version 3.1