high
8.4
CWE
190 787
Advisory Published
CVE Published
CVE Published
Updated

CVE-2021-33909: Integer Overflow

First published: Thu Jun 10 2021(Updated: )

An out-of-bounds write flaw was found in the Linux kernel's seq_file in the Filesystem layer. This flaw allows a local attacker with a user privilege to gain access to out-of-bound memory, leading to a system crash, leak of internal kernel information and can escalate privileges. The issue results from not validating the size_t-to-int conversion prior to performing operations. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.

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

Affected SoftwareAffected VersionHow to fix
redhat/kernel<0:2.6.32-754.41.2.el6
0:2.6.32-754.41.2.el6
redhat/kernel-rt<0:3.10.0-1160.36.2.rt56.1179.el7
0:3.10.0-1160.36.2.rt56.1179.el7
redhat/kernel<0:3.10.0-1160.36.2.el7
0:3.10.0-1160.36.2.el7
redhat/kernel<0:3.10.0-327.98.2.el7
0:3.10.0-327.98.2.el7
redhat/kernel<0:3.10.0-514.90.2.el7
0:3.10.0-514.90.2.el7
redhat/kernel<0:3.10.0-693.90.2.el7
0:3.10.0-693.90.2.el7
redhat/kernel<0:3.10.0-957.78.2.el7
0:3.10.0-957.78.2.el7
redhat/kernel<0:3.10.0-1062.52.2.el7
0:3.10.0-1062.52.2.el7
redhat/kernel-rt<0:4.18.0-305.10.2.rt7.83.el8_4
0:4.18.0-305.10.2.rt7.83.el8_4
redhat/kernel<0:4.18.0-305.10.2.el8_4
0:4.18.0-305.10.2.el8_4
redhat/kernel<0:4.18.0-147.51.2.el8_1
0:4.18.0-147.51.2.el8_1
redhat/kernel-rt<0:4.18.0-193.60.2.rt13.112.el8_2
0:4.18.0-193.60.2.rt13.112.el8_2
redhat/kernel<0:4.18.0-193.60.2.el8_2
0:4.18.0-193.60.2.el8_2
redhat/redhat-virtualization-host<0:4.3.17-20210713.0.el7_9
0:4.3.17-20210713.0.el7_9
redhat/redhat-virtualization-host<0:4.4.7-20210715.1.el8_4
0:4.4.7-20210715.1.el8_4
Linux Linux kernel>=3.12.43<3.13
Linux Linux kernel>=3.16<4.4.276
Linux Linux kernel>=4.5<4.9.276
Linux Linux kernel>=4.10<4.14.240
Linux Linux kernel>=4.15<4.19.198
Linux Linux kernel>=4.20<5.4.134
Linux Linux kernel>=5.5<5.10.52
Linux Linux kernel>=5.11<5.12.19
Linux Linux kernel>=5.13<5.13.4
Fedoraproject Fedora=34
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Netapp Hci Management Node
Netapp Solidfire
Oracle Communications Session Border Controller=8.2
Oracle Communications Session Border Controller=8.3
Oracle Communications Session Border Controller=8.4
Oracle Communications Session Border Controller=9.0
Sonicwall Sma1000 Firmware<=12.4.2-02044
SonicWall SMA1000
redhat/kernel<5.14
5.14
All of
Sonicwall Sma1000 Firmware<=12.4.2-02044
SonicWall SMA1000
Google Android
IBM DRM<=2.0.6
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.7-1
6.11.9-1

Remedy

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

Remedy

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4

Remedy

https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b

Remedy

https://www.oracle.com/security-alerts/cpujan2022.html

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