VDB
CVE-2021-3444
CVE-2021-3444
PUBLISHED
CVSS 7.800000190734863 HIGH
The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.
EPSS 0.61% · 49.2th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.61%
49.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | linux-gke-5.3 | 5.3.0-1014.15~18.04.1, 0, 5.3.0-1011.12~18.04.1 |
| Ubuntu:18.04:LTS | linux-aws-5.4 | 5.4.0-1029.30~18.04.1, 5.4.0-1037.39~18.04.1, 5.4.0-1035.37~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1013.18, 5.0.0-1014.19, 5.0.0-1011.16 |
| Ubuntu:18.04:LTS | linux-gcp-5.4 | 5.4.0-1030.32~18.04.1, 5.4.0-1033.35~18.04.1, 5.4.0-1034.37~18.04.1 |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | 5.8.0-18.20~20.04.1, 0, 5.8.0-14.16~20.04.1 |
| 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:20.04:LTS | linux-azure | 5.4.0-1020.20, 5.4.0-1036.38, 5.4.0-1023.23 |
| Ubuntu:18.04:LTS | linux-hwe-5.4 | 0, 5.4.0-39.43~18.04.1, 5.4.0-47.51~18.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1010.11~18.04.1, 5.3.0-1017.18~18.04.1, 5.3.0-1009.10~18.04.1 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | 0, 5.15.0-1073.75 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1017.18, 4.15.0-1001.1, 5.0.0-1034.35 |
| Ubuntu:Pro:FIPS:20.04:LTS | linux-aws-fips | 0, 5.4.0-1021.21+fips2 |
| Ubuntu:18.04:LTS | linux-azure | 5.0.0-1014.14~18.04.1, 5.0.0-1016.17~18.04.1, 5.0.0-1020.21~18.04.1 |
| Ubuntu:18.04:LTS | linux-raspi2-5.3 | 5.3.0-1021.23~18.04.1, 5.3.0-1037.39, 5.3.0-1032.34 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.10.0-19.21~16.04.1, 4.10.0-21.23~16.04.1, 4.10.0-24.28~16.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-edge | 4.18.0-1015.16~18.04.1, 4.18.0-1009.10~18.04.1, 5.0.0-1011.11~18.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.6 | 5.6.0-1007.7, 0, 5.6.0-1008.8 |
| Ubuntu:22.04:LTS | linux-realtime | 0, 5.15.0-1032.35 |
| Ubuntu:20.04:LTS | linux-kvm | 5.4.0-1006.6, 5.4.0-1026.27, 5.4.0-1034.35 |
| Ubuntu:Pro:FIPS-updates:20.04:LTS | linux-gcp-fips | 5.4.0-1021.21+fips1, 0 |
…and 29 more
Timeline
- Mar 23, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 24, 2021 EPSS Score
- Aug 26, 2021 EPSS Score
- Dec 31, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 5, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 7, 2022 EPSS Score
- Sep 12, 2022 EPSS Score
- Nov 15, 2022 EPSS Score
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809309163dda2d044d9e94a3c0248a3 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/03/23/2 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-3444 third-party-advisory
- https://ubuntu.com/security/CVE-2021-3444 advisory
- https://ubuntu.com/security/notices/USN-4887-1 advisory