Integer overflow in Linux Kernel
CVE-2021-3428
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (20.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux Kernel
- Kernel — versions Affects linux kernel before v5.9.
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Permissions Required, Third Party Advisory, Issue Tracking)
- ubuntu.com/security/CVE-2021-3428 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/03/17/1 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3428?
- CVE-2021-3428 is a medium-severity vulnerability in Linux Kernel, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2022-03-04.
- How severe is CVE-2021-3428?
- Medium severity. CVSS v3 base score is 5.5 out of 10.