VDB
CVE-2021-20226
CVE-2021-20226
PUBLISHED
A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.
EPSS 0.09% · 26.0th percentile
Risk Scores
EPSS Score
0.09%
26.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | linux-hwe-5.8 | *, *, 5.8.0-33.36~20.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 5.3.0-1030.32~18.04.1, 5.3.0-1018.20~18.04.1, 5.3.0-1024.26~18.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.6 | 5.6.0-1034.36, 5.6.0-1056.60, 5.6.0-1028.28 |
| Ubuntu:18.04:LTS | linux-gcp-edge | 0, 4.18.0-1013.14~18.04.1, 5.0.0-1011.11~18.04.1 |
| Ubuntu:18.04:LTS | linux-aws-5.3 | *, 5.3.0-1016.17~18.04.1, 5.3.0-1017.18~18.04.1 |
| Ubuntu:20.04:LTS | linux-riscv | 0, 5.4.0-30.34, 5.4.0-40.45 |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1102.113, 0, 4.15.0-1002.3 |
| Ubuntu:18.04:LTS | linux-gcp | 5.0.0-1025.26~18.04.1, 4.15.0-1023.24, 4.15.0-1024.25 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1009.14~18.04.1, 5.0.0-1010.15~18.04.1, 5.0.0-1011.16 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1030.32~18.04.1, 5.3.0-1029.31~18.04.1, 5.3.0-1026.28~18.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.13.0-19.22~16.04.1, 4.15.0-20.21~16.04.1, 4.15.0-23.25~16.04.1 |
| Ubuntu:18.04:LTS | linux-hwe-edge | 5.3.0-23.25~18.04.2, 5.3.0-23.25~18.04.1, 5.3.0-22.24~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure | 4.15.0-1019.19, 4.15.0-1018.18, 4.15.0-1014.14 |
| Ubuntu:18.04:LTS | linux-hwe | 5.0.0-35.38~18.04.1, 5.0.0-23.24~18.04.1, 5.0.0-27.28~18.04.1 |
| Ubuntu:20.04:LTS | linux-raspi2 | 5.4.0-1004.4, 5.4.0-1006.6, 5.3.0-1017.19 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 5.0.0-1027.30, *, * |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 5.3.0-1007.8~18.04.1, 5.3.0-1034.35~18.04.1, 5.3.0-1032.33~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1006.6~18.04.1, 5.0.0-1012.12~18.04.2, 4.18.0-1007.7~18.04.1 |
Exploit Intelligence
Timeline
- Feb 23, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20226 third-party-advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-001/ third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/02/05/4 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20226 third-party-advisory