VDB
CVE-2021-20268
CVE-2021-20268
PUBLISHED
An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
EPSS 0.13% · 32.5th percentile
Risk Scores
EPSS Score
0.13%
32.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-gcp-edge | 4.18.0-1006.7~18.04.1, 4.18.0-1004.5~18.04.1, 4.18.0-1008.9~18.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.8.0-28.30~16.04.1, 0, * |
| Ubuntu:18.04:LTS | linux-hwe | 5.3.0-66.60, 5.3.0-68.63, 5.3.0-69.65 |
| Ubuntu:20.04:LTS | linux-riscv | 5.4.0-24.28, 5.4.0-26.30, 5.4.0-27.31 |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1100.110, 4.15.0-1097.107, 4.15.0-1103.114 |
| Ubuntu:18.04:LTS | linux-gke-4.15 | 0, 4.15.0-1033.35, 4.15.0-1032.34 |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 5.3.0-1017.18~18.04.1, 5.3.0-1023.25~18.04.1, 5.3.0-1034.36 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1028.29, 0, 4.15.0-1001.1 |
| Ubuntu:18.04:LTS | linux-azure | 4.18.0-1011.11~18.04.1, 4.15.0-1002.2, 4.15.0-1003.3 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1010.15~18.04.1, 5.0.0-1009.14~18.04.1, 5.0.0-1008.13~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 0, 5.3.0-1010.11~18.04.1, 5.3.0-1009.10~18.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.10 | 5.10.0-1011.12, 5.10.0-1013.14, 5.10.0-1008.9 |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 5.8.0-29.31~20.04.1, 5.8.0-28.30~20.04.1, 5.8.0-25.26~20.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | *, 0, 5.3.0-1008.9~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 0, *, 5.3.0-1014.15~18.04.1 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 0, *, 5.0.0-1027.30 |
| Ubuntu:18.04:LTS | linux-hwe-edge | 5.0.0-17.18~18.04.1, 5.0.0-19.20~18.04.1, 5.3.0-19.20~18.04.2 |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | 5.8.0-20.22~20.04.1, 5.8.0-18.20~20.04.1, 5.8.0-17.19~20.04.1 |
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1007.7~18.04.1, 4.18.0-1008.8~18.04.1, 5.0.0-1012.12~18.04.2 |
| Ubuntu:20.04:LTS | linux-raspi2 | 5.3.0-1014.16, 5.3.0-1015.17, 5.3.0-1017.19 |
Timeline
- Mar 9, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 22, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 25, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 27, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 2, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20268 third-party-advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-101/ third-party-advisory
- https://git.kernel.org/linus/bc895e8b2a64e502fbba72748d59618272052a8b third-party-advisory
- https://ubuntu.com/security/notices/USN-4910-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20268 third-party-advisory