Incorrect Calculation of Buffer Size Affecting kernel-rt-kvm package, versions <0:4.18.0-348.12.2.rt7.143.el8_5
Threat Intelligence
EPSS
0.04% (6th
percentile)
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTKVM-2332335
- published 10 Jan 2022
- disclosed 10 Jan 2022
Introduced: 10 Jan 2022
CVE-2021-4155 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-kvm to version 0:4.18.0-348.12.2.rt7.143.el8_5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.
References
- https://access.redhat.com/security/cve/CVE-2021-4155
- https://access.redhat.com/errata/RHSA-2022:0176
- https://bugzilla.redhat.com/show_bug.cgi?id=2034813
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79
- https://security-tracker.debian.org/tracker/CVE-2021-4155
- https://www.openwall.com/lists/oss-security/2022/01/10/1
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