Vulnerability · Published Mar 4, 2022 · Assigned by redhat
CVE-2021-3428
Medium 5.5
In plain English
A medium-severity integer overflow in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 77.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.8.7-1 | DEBIAN-CVE-2021-3428 |
| Debian:13 | linux | 5.8.7-1 | DEBIAN-CVE-2021-3428 |
| Debian:14 | linux | 5.8.7-1 | DEBIAN-CVE-2021-3428 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-3428 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-3428 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-3428 |
Affected products (as reported)
Weakness: CWE-190
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1972621 x_refsource_MISC
- https://ubuntu.com/security/CVE-2021-3428 x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2021/03/17/1 x_refsource_MISC