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
Google Android
IBM DRM<=2.0.6
All of
Sonicwall Sma1000 Firmware<=12.4.2-02044
SonicWall SMA1000
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.5-1

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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203