CVE-2021-3490: (Pwn2Own) Canonical Ubuntu eBPF Out-Of-Bounds Access Privilege Escalation Vulnerability
First published: Fri Jun 04 2021(Updated: )
Last updated 24 July 2024
Credit: security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 | |
| Linux kernel | >=5.10<5.10.37 | |
| Linux kernel | >=5.11<5.11.21 | |
| Linux kernel | >=5.12<5.12.4 | |
| Linux kernel | =5.13 | |
| Linux kernel | =5.13-rc1 | |
| Linux kernel | =5.13-rc2 | |
| Linux kernel | =5.13-rc3 | |
| Ubuntu | =20.04 | |
| Ubuntu | =20.10 | |
| Ubuntu | =21.04 |
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Reference Links
- http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e
- https://security.netapp.com/advisory/ntap-20210716-0004/
- https://ubuntu.com/security/notices/USN-4949-1
- https://ubuntu.com/security/notices/USN-4950-1
- https://www.openwall.com/lists/oss-security/2021/05/11/11
- https://www.zerodayinitiative.com/advisories/ZDI-21-606/
- https://launchpad.net/bugs/cve/CVE-2021-3490
- https://security-tracker.debian.org/tracker/CVE-2021-3490
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3490
- https://nvd.nist.gov/vuln/detail/CVE-2021-3490
- https://ubuntu.com/security/CVE-2021-3490
Frequently Asked Questions
What is the severity of CVE-2021-3490?
CVE-2021-3490 is considered a high severity vulnerability due to its potential for arbitrary code execution in the Linux kernel.
How do I fix CVE-2021-3490?
To mitigate CVE-2021-3490, update your Linux kernel to a version that addresses this vulnerability, such as 5.10.223-1 or later.
Which Linux kernel versions are affected by CVE-2021-3490?
CVE-2021-3490 affects Linux kernel versions between 5.10 and 5.13, including specific release candidates.
What type of vulnerability is CVE-2021-3490 classified as?
CVE-2021-3490 is classified as a memory corruption vulnerability that stems from improper bounds tracking.
Can CVE-2021-3490 be exploited remotely?
CVE-2021-3490 requires local access to the system for exploitation, making it a local privilege escalation issue.
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