Ubuntu.comUB:CVE-2021-20268CVE-2021-20268
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.3%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.10 | noarch | linux | < 5.8.0-49.55 | UNKNOWN |
| ubuntu | 20.10 | noarch | linux-aws | < 5.8.0-1028.30 | UNKNOWN |
| ubuntu | 20.10 | noarch | linux-azure | < 5.8.0-1027.29 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
| ubuntu | 20.10 | noarch | linux-gcp | < 5.8.0-1027.28 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-gkeop | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gkeop-5.15 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-hwe-5.8 | < 5.8.0-49.55~20.04.1 | UNKNOWN |
| ubuntu | 20.10 | noarch | linux-kvm | < 5.8.0-1023.25 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-oem-5.10 | < 5.10.0-1014.15 | UNKNOWN |
References
git.kernel.org/linus/bc895e8b2a64e502fbba72748d59618272052a8b
launchpad.net/bugs/cve/CVE-2021-20268
nvd.nist.gov/vuln/detail/CVE-2021-20268
security-tracker.debian.org/tracker/CVE-2021-20268
ubuntu.com/security/notices/USN-4910-1
www.cve.org/CVERecord?id=CVE-2021-20268
www.zerodayinitiative.com/advisories/ZDI-21-101/
Related
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.3%