Vulnerability · Published May 5, 2021 · Assigned by redhat
CVE-2021-3501
High 7.1
In plain English
A high-severity out-of-bounds write in kernel from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.1High
Exploit odds (30 days)0.4%top 68.1% 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 in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-305.3.1.el8_4 | ALSA-2021:2168 |
| Debian:12 | linux | 5.10.38-1 | DEBIAN-CVE-2021-3501 |
| Debian:13 | linux | 5.10.38-1 | DEBIAN-CVE-2021-3501 |
| Debian:14 | linux | 5.10.38-1 | DEBIAN-CVE-2021-3501 |
| Rocky Linux:8 | kernel | 0:4.18.0-305.3.1.el8_4 | RLSA-2021:2168 |
Affected products (as reported)
Weakness: CWE-787