Vulnerability · Published Jan 8, 2024 · Assigned by canonical
CVE-2021-3600
High 7.8
In plain English
A high-severity out-of-bounds read in linux from The Linux Kernel Organization. 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 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 79.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-348.el8 | ALSA-2021:4356 |
| Debian:12 | linux | 5.10.19-1 | DEBIAN-CVE-2021-3600 |
| Debian:13 | linux | 5.10.19-1 | DEBIAN-CVE-2021-3600 |
| Debian:14 | linux | 5.10.19-1 | DEBIAN-CVE-2021-3600 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-3600 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-3600 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-3600 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Linux Kernel Organization | linux | 0 – before 5.11 |
Weakness: CWE-125, CWE-787 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3600 issue-tracking
- https://ubuntu.com/security/notices/USN-5003-1 third-party-advisory
- https://git.kernel.org/linus/e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90 issue-tracking