VDB
CVE-2021-26708
CVE-2021-26708
PUBLISHED
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.
EPSS 0.93% · 76.6th percentile
Risk Scores
EPSS Score
0.93%
76.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | linux-riscv | 5.4.0-33.37, 5.4.0-27.31, 5.4.0-26.30 |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 5.3.0-1010.11~18.04.1, 5.3.0-1012.13~18.04.1, 5.3.0-1013.14~18.04.1 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.10.0-26.30~16.04.1, *, * |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | *, 0, 5.8.0-14.16~20.04.1 |
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1008.8~18.04.1, 5.0.0-1012.12~18.04.2, 4.18.0-1007.7~18.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-edge | *, 0, 4.18.0-1004.5~18.04.1 |
| Ubuntu:20.04:LTS | linux-raspi2 | 5.4.0-1004.4, 5.3.0-1017.19, 5.3.0-1015.17 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1030.32~18.04.1, 5.3.0-1032.34~18.04.1, 5.3.0-1017.18~18.04.1 |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1036.41, 4.15.0-1033.38, 4.15.0-1026.31 |
| Ubuntu:20.04:LTS | linux-oem-5.6 | 5.6.0-1032.33, 5.6.0-1011.11, 5.6.0-1031.32 |
| Ubuntu:18.04:LTS | linux-gcp | *, 4.15.0-1026.27, 4.15.0-1003.3 |
| Ubuntu:18.04:LTS | linux-hwe-edge | 0, *, * |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 5.3.0-1027.29~18.04.1, 5.3.0-1013.14~18.04.1, 5.3.0-1014.15~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | *, 0, 5.0.0-1008.13~18.04.1 |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 5.8.0-36.40~20.04.1, 5.8.0-38.43~20.04.1, 5.8.0-40.45~20.04.1 |
| Ubuntu:18.04:LTS | linux-hwe | 5.0.0-23.24~18.04.1, *, * |
| Ubuntu:18.04:LTS | linux-azure | 4.15.0-1004.4, 4.15.0-1003.3, 5.0.0-1025.27~18.04.1 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 5.0.0-1022.25~18.04.1, 0, 5.0.0-1027.30 |
| Ubuntu:20.04:LTS | linux-oem-5.10 | 5.10.0-1014.15, 5.10.0-1013.14, 5.10.0-1011.12 |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 0, 5.3.0-1016.17~18.04.1, 5.3.0-1017.18~18.04.1 |
Exploit Intelligence
- azpema/CVE-2021-26708 (github-poc)
- azpema/CVE-2021-26708 (github-poc)
- azpema/CVE-2021-26708 (github-poc)
- azpema/CVE-2021-26708 (github-poc)
- Investigating the bug behind CVE-2021-26708 (github-poc)
- Investigating the bug behind CVE-2021-26708 (github-poc)
- Investigating the bug behind CVE-2021-26708 (github-poc)
- Investigating the bug behind CVE-2021-26708 (github-poc)
- [oss-security] 20210205 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation (cve.org)
- [oss-security] 20210409 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation (cve.org)
…and 1 more exploits
Timeline
- Feb 5, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 28, 2022 EPSS Score
- May 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-2021-26708 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/02/04/5 third-party-advisory
- https://git.kernel.org/linus/c518adafa39f37858697ac9309c6cf1805581446 third-party-advisory
- http://www.openwall.com/lists/oss-security/2021/02/05/6 third-party-advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13 third-party-advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446 third-party-advisory
- https://ubuntu.com/security/notices/USN-4727-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26708 third-party-advisory