Use After Free Affecting kernel-debug-devel package, versions <0:4.18.0-193.el8
Threat Intelligence
EPSS
0.97% (84th
percentile)
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGDEVEL-3731879
- published 26 Jul 2021
- disclosed 29 Nov 2019
Introduced: 29 Nov 2019
CVE-2019-19768 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-devel to version 0:4.18.0-193.el8 or higher.
This issue was patched in RHSA-2020:1769.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel package and not the kernel-debug-devel package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace function in kernel/trace/blktrace.c (which is used to fill out a blk_io_trace structure and place it in a per-cpu sub-buffer).
References
- https://security.netapp.com/advisory/ntap-20200103-0001/
- https://access.redhat.com/security/cve/CVE-2019-19768
- https://www.debian.org/security/2020/dsa-4698
- https://bugzilla.kernel.org/show_bug.cgi?id=205711
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://access.redhat.com/errata/RHSA-2020:1769
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html
- https://usn.ubuntu.com/4342-1/
- https://usn.ubuntu.com/4344-1/
- https://usn.ubuntu.com/4345-1/
- https://usn.ubuntu.com/4346-1/
CVSS Scores
version 3.1