high
7.1
CWE
125 200
Advisory Published
CVE Published
CVE Published
Updated

CVE-2021-27364: Infoleak

First published: Thu Feb 18 2021(Updated: )

A flaw was found in the Linux kernel. An out-of-bounds read was discovered in the libiscsi module that could lead to reading kernel memory or a crash. The highest threat from this vulnerability is to data confidentiality as well as system availability.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel<0:2.6.32-754.39.1.el6
0:2.6.32-754.39.1.el6
redhat/kernel-rt<0:3.10.0-1160.24.1.rt56.1161.el7
0:3.10.0-1160.24.1.rt56.1161.el7
redhat/kernel<0:3.10.0-1160.24.1.el7
0:3.10.0-1160.24.1.el7
redhat/kernel-alt<0:4.14.0-115.36.1.el7a
0:4.14.0-115.36.1.el7a
redhat/kernel<0:3.10.0-327.96.1.el7
0:3.10.0-327.96.1.el7
redhat/kernel<0:3.10.0-514.88.1.el7
0:3.10.0-514.88.1.el7
redhat/kernel<0:3.10.0-693.84.1.el7
0:3.10.0-693.84.1.el7
redhat/kernel<0:3.10.0-957.72.1.el7
0:3.10.0-957.72.1.el7
redhat/kernel<0:3.10.0-1062.49.1.el7
0:3.10.0-1062.49.1.el7
redhat/kernel-rt<0:4.18.0-240.22.1.rt7.77.el8_3
0:4.18.0-240.22.1.rt7.77.el8_3
redhat/kernel<0:4.18.0-240.22.1.el8_3
0:4.18.0-240.22.1.el8_3
redhat/kernel<0:4.18.0-147.44.1.el8_1
0:4.18.0-147.44.1.el8_1
redhat/kernel-rt<0:4.18.0-193.51.1.rt13.101.el8_2
0:4.18.0-193.51.1.rt13.101.el8_2
redhat/kernel<0:4.18.0-193.51.1.el8_2
0:4.18.0-193.51.1.el8_2
Linux Linux kernel<=5.11.3
Debian Debian Linux=9.0
All of
Netapp Solidfire Baseboard Management Controller Firmware
Netapp Solidfire Baseboard Management Controller
Oracle Tekelec Platform Distribution>=7.4.0<=7.7.1
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Netapp Solidfire Baseboard Management Controller Firmware
Netapp Solidfire Baseboard Management Controller
debian/linux
5.10.223-1
6.1.106-3
6.1.99-1
6.10.9-1

Remedy

The LIBISCSI module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install libiscsi /bin/true" >> /etc/modprobe.d/disable-libiscsi.conf The system will need to be restarted if the libiscsi modules are loaded. In most circumstances, the libiscsi kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use. If the system requires iscsi to work correctly, this mitigation may not be suitable. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa

Remedy

https://www.oracle.com/security-alerts/cpuoct2021.html

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