VDB
CVE-2021-20268
CVE-2021-20268
PUBLISHED
CVSS 7.800000190734863 HIGH
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 0.32% · 24.9th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.32%
24.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-gcp-edge | 0, *, 5.0.0-1013.13~18.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.10.0-22.24~16.04.1, 4.10.0-20.22~16.04.1, 4.10.0-19.21~16.04.1 |
| Ubuntu:18.04:LTS | linux-hwe | 5.3.0-59.53~18.04.1, 5.0.0-25.26~18.04.1, 5.0.0-27.28~18.04.1 |
| 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 | 4.15.0-1009.12, 0, 4.15.0-1002.3 |
| Ubuntu:18.04:LTS | linux-gke-4.15 | 4.15.0-1077.82, 4.15.0-1076.81, 4.15.0-1073.78 |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 5.3.0-1034.36, 5.3.0-1017.18~18.04.1, 5.3.0-1019.21~18.04.1 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1006.6, 4.15.0-1005.5, 4.15.0-1003.3 |
| Ubuntu:18.04:LTS | linux-azure | 5.0.0-1014.14~18.04.1, 4.15.0-1002.2, 4.15.0-1003.3 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1014.19, 5.0.0-1013.18, 5.0.0-1008.13~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 5.3.0-1020.21~18.04.1, 5.3.0-1032.33~18.04.1, 5.3.0-1034.35~18.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.10 | 0, 5.10.0-1011.12, 5.10.0-1008.9 |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 5.8.0-44.50~20.04.1, *, 5.8.0-48.54~20.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1020.22~18.04.1, 5.3.0-1026.28~18.04.1, 5.3.0-1029.31~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 5.3.0-1016.18~18.04.1, 5.3.0-1014.15~18.04.1, 5.3.0-1013.14~18.04.1 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | *, 0, 5.0.0-1023.26~18.04.1 |
| Ubuntu:18.04:LTS | linux-hwe-edge | *, 5.0.0-15.16~18.04.1, 5.0.0-16.17~18.04.1 |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | 0, 5.8.0-18.20~20.04.1, * |
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1007.7~18.04.1, 5.0.0-1012.12~18.04.2, 4.18.0-1008.8~18.04.1 |
| Ubuntu:20.04:LTS | linux-raspi2 | 5.3.0-1007.8, 5.4.0-1006.6, 5.4.0-1004.4 |
Timeline
- Mar 9, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 26, 2021 EPSS Score
- Oct 28, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 6, 2022 EPSS Score
- Jul 8, 2022 EPSS Score
- Sep 10, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20268 advisory
- https://ubuntu.com/security/notices/USN-4910-1 advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-101/ third-party-advisory
- https://git.kernel.org/linus/bc895e8b2a64e502fbba72748d59618272052a8b third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20268 third-party-advisory