RHSA-2021:2732: Important: kernel security update
First published: Tue Jul 20 2021(Updated: )
The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)</li> <li> kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)</li> <li> kernel: Use after free via PI futex state (CVE-2021-3347)</li> <li> kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-abi-whitelists | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-doc | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-headers | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-libs | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/perf | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/perf-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/python-perf | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/python-perf-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-bootwrapper | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debug-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-debuginfo-common-ppc64le | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-headers | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-libs | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/perf | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/perf-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/python-perf | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
| redhat/python-perf-debuginfo | <3.10.0-693.90.2.el7 | 3.10.0-693.90.2.el7 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1899804
- https://bugzilla.redhat.com/show_bug.cgi?id=1922249
- https://bugzilla.redhat.com/show_bug.cgi?id=1961305
- https://bugzilla.redhat.com/show_bug.cgi?id=1970273
- https://access.redhat.com/security/updates/classification/#important
- https://access.redhat.com/security/vulnerabilities/RHSB-2021-006
- https://access.redhat.com/errata/RHSA-2021:2732 (Advisory)
Frequently Asked Questions
What are the vulnerabilities fixed in RHSA-2021:2732?
RHSA-2021:2732 addresses a size_t-to-int conversion vulnerability in the filesystem layer and a SCSI target write access issue.
How do I fix RHSA-2021:2732?
To fix RHSA-2021:2732, upgrade the kernel packages to version 3.10.0-693.90.2.el7 or later.
Which systems are affected by RHSA-2021:2732?
RHSA-2021:2732 affects systems running the kernel packages prior to version 3.10.0-693.90.2.el7.
What is the severity level of RHSA-2021:2732?
The severity level of RHSA-2021:2732 is classified as important.
Is there any downtime required for the patch in RHSA-2021:2732?
Yes, applying the patch for RHSA-2021:2732 may require a system reboot for the changes to take effect.
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