CVE-2021-3428: Integer Overflow
First published: Tue Mar 09 2021(Updated: )
A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.9 | 5.9 |
| Linux Kernel | <5.9.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.21-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1972621
- https://ubuntu.com/security/CVE-2021-3428
- https://www.openwall.com/lists/oss-security/2021/03/17/1
- https://launchpad.net/bugs/cve/CVE-2021-3428
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1936787
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/errata/RHSA-2021:1739
- https://bugzilla.redhat.com/show_bug.cgi?id=1936786
- https://bugzilla.suse.com/show_bug.cgi?id=1173485
- https://security-tracker.debian.org/tracker/CVE-2021-3428
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3428
- https://nvd.nist.gov/vuln/detail/CVE-2021-3428
Frequently Asked Questions
What is the severity of CVE-2021-3428?
CVE-2021-3428 has been assigned a high severity due to its potential for causing denial of service.
How do I fix CVE-2021-3428?
To fix CVE-2021-3428, update the Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.11-1, or 6.12.12-1.
Which versions of Linux are affected by CVE-2021-3428?
CVE-2021-3428 affects Linux kernel versions up to 5.9.0.
Who can exploit CVE-2021-3428?
CVE-2021-3428 can be exploited by a local attacker with special user privileges.
What type of attack is CVE-2021-3428 associated with?
CVE-2021-3428 is associated with a denial of service attack due to a crafted ext4 filesystem.
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