VDB
CVE-2021-20239
CVE-2021-20239
PUBLISHED
CVSS 3.299999952316284 LOW
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
EPSS 0.26% · 17.0th percentile
Risk Scores
CVSS 3.1
3.299999952316284
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.26%
17.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-aws-5.4 | 5.4.0-1037.39~18.04.1, 0, 5.4.0-1018.18~18.04.1 |
| Ubuntu:20.04:LTS | linux-riscv | 5.4.0-26.30, 0, 5.4.0-30.34 |
| Ubuntu:18.04:LTS | linux-gcp | *, 4.15.0-1010.10, 5.0.0-1034.35 |
| Ubuntu:20.04:LTS | linux-gcp | 5.3.0-1011.12, 5.4.0-1009.9, 5.3.0-1009.10 |
| Ubuntu:Pro:FIPS:20.04:LTS | linux-gcp-fips | 0, 5.4.0-1021.21+fips1 |
| Ubuntu:18.04:LTS | linux-hwe-edge | *, 5.3.0-23.25~18.04.2, 5.3.0-23.25~18.04.1 |
| Ubuntu:Pro:FIPS:20.04:LTS | linux-aws-fips | 0, 5.4.0-1021.21+fips2 |
| Ubuntu:18.04:LTS | linux-gcp-5.4 | 5.4.0-1025.25~18.04.1, 5.4.0-1024.24~18.04.1, 5.4.0-1022.22~18.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.6 | 5.6.0-1007.7, 5.6.0-1017.17, 5.6.0-1042.46 |
| Ubuntu:Pro:FIPS-updates:20.04:LTS | linux-gcp-fips | 0, 5.4.0-1021.21+fips1 |
| Ubuntu:18.04:LTS | linux-azure | *, 0, 4.15.0-1004.4 |
| Ubuntu:20.04:LTS | linux-oracle | 5.3.0-1008.9, 5.4.0-1005.5, 5.4.0-1008.8 |
| Ubuntu:18.04:LTS | linux-azure-5.4 | 5.4.0-1022.22~18.04.1, 5.4.0-1020.20~18.04.1, 0 |
| Ubuntu:20.04:LTS | linux-kvm | 5.4.0-1018.18, 5.4.0-1015.15, 5.4.0-1011.11 |
| Ubuntu:Pro:FIPS:20.04:LTS | linux-azure-fips | 5.4.0-1022.22+fips1, 0 |
| Ubuntu:20.04:LTS | linux-raspi | 5.4.0-1007.7, 5.4.0-1018.20, 5.4.0-1022.25 |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 5.8.0-38.43~20.04.1, 5.8.0-40.45~20.04.1, 5.8.0-41.46~20.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.15.0-22.24~16.04.1, 4.15.0-15.16~16.04.1, 0 |
| Ubuntu:Pro:FIPS-updates:20.04:LTS | linux-aws-fips | *, 0 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1008.13~18.04.1, 0, 5.0.0-1007.12~18.04.1 |
…and 26 more
Timeline
- Feb 17, 2021 CVE Published
- May 29, 2021 EPSS Score
- Aug 1, 2021 EPSS Score
- Oct 2, 2021 EPSS Score
- Dec 2, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 5, 2022 EPSS Score
- Jun 6, 2022 EPSS Score
- Aug 8, 2022 EPSS Score
- Oct 8, 2022 EPSS Score
- Dec 9, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20239 advisory
- https://gist.github.com/Ga-ryo/2ec958e78f55c5d18558960f3fe1c6ec exploit
- https://ubuntu.com/security/notices/USN-4878-1 advisory
- https://ubuntu.com/security/notices/USN-4910-1 advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-100/ third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20239 third-party-advisory