CVE-2021-4204
What it is
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, service disruption.
- Exploit odds
- 1.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.2% in the next 30 days (EPSS).
- Severity: 7.1 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.2% · EPSS, next 30 days
- Weakness
- CWE-20 · Improper input validation
- Record status
- Modified
Affected
- Linux Kernel < 5.8.0
- Linux Kernel 5.8.0
- Debian Linux 11.0
- Redhat Enterprise Linux 9.0
- Netapp h300s Firmware
- Netapp h500s Firmware
- Netapp h700s Firmware
- Netapp h410s Firmware
Attack profile CVSS 3.1 · 7.1
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-4204.md and follow it. Check whether this project is affected by CVE-2021-4204. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://access.redhat.com/security/cve/CVE-2021-4204
- https://www.openwall.com/lists/oss-security/2022/01/11/4
- https://access.redhat.com/security/cve/CVE-2021-4204
- https://www.openwall.com/lists/oss-security/2022/01/11/4
References
- https://access.redhat.com/security/cve/CVE-2021-4204
- https://bugzilla.redhat.com/show_bug.cgi?id=2039178
- https://security-tracker.debian.org/tracker/CVE-2021-4204
- https://security.netapp.com/advisory/ntap-20221228-0003/
- https://www.openwall.com/lists/oss-security/2022/01/11/4
- https://access.redhat.com/security/cve/CVE-2021-4204
- https://bugzilla.redhat.com/show_bug.cgi?id=2039178
- https://security-tracker.debian.org/tracker/CVE-2021-4204
- https://security.netapp.com/advisory/ntap-20221228-0003/
- https://www.openwall.com/lists/oss-security/2022/01/11/4