CVE-2021-28688

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.

References

https://xenbits.xenproject.org/xsa/advisory-371.txt

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Details

Source: MITRE

Published: 2021-04-06

Updated: 2021-06-23

Type: CWE-665

Risk Information

CVSS v2

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Impact Score: 4

Exploitability Score: 2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from 3.11 to 5.10.18 (inclusive)

Tenable Plugins

View all (38 total)

IDNameProductFamilySeverity
152842SUSE SLES12 Security Update : kernel (Live Patch 40 for SLE 12 SP3) (SUSE-SU-2021:2846-1)NessusSuSE Local Security Checks
high
152167SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1)NessusSuSE Local Security Checks
high
151897Slackware 14.2 : Slackware 14.2 kernel (SSA:2021-202-01)NessusSlackware Local Security Checks
high
151756openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1977-1)NessusSuSE Local Security Checks
critical
151730openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1975-1)NessusSuSE Local Security Checks
critical
151307EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-2075)NessusHuawei Local Security Checks
high
151240EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2062)NessusHuawei Local Security Checks
high
151042EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-1983)NessusHuawei Local Security Checks
high
150985Debian DLA-2689-1 : linux security updateNessusDebian Local Security Checks
high
150984Debian DLA-2690-1 : linux-4.19 security updateNessusDebian Local Security Checks
high
150928SUSE SLES12 Security Update : kernel (Live Patch 39 for SLE 12 SP3) (SUSE-SU-2021:2026-1)NessusSuSE Local Security Checks
high
150927SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1975-1)NessusSuSE Local Security Checks
critical
150901SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1977-1)NessusSuSE Local Security Checks
critical
150463OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0016)NessusOracleVM Local Security Checks
high
150292Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1)NessusUbuntu Local Security Checks
medium
150271EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1967)NessusHuawei Local Security Checks
high
150233Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4982-1)NessusUbuntu Local Security Checks
medium
149892openSUSE Security Update : the Linux Kernel (openSUSE-2021-758)NessusSuSE Local Security Checks
critical
149872Amazon Linux AMI : kernel (ALAS-2021-1503)NessusAmazon Linux Local Security Checks
high
149717SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1624-1)NessusSuSE Local Security Checks
high
149491SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1596-1)NessusSuSE Local Security Checks
high
149462SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1573-1)NessusSuSE Local Security Checks
high
149421Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9222)NessusOracle Linux Local Security Checks
high
149420Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9223)NessusOracle Linux Local Security Checks
high
149410Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4946-1)NessusUbuntu Local Security Checks
medium
149407Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4948-1)NessusUbuntu Local Security Checks
high
149357Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9220)NessusOracle Linux Local Security Checks
high
149356Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9221)NessusOracle Linux Local Security Checks
high
149296Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9215)NessusOracle Linux Local Security Checks
high
149083SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1373-1)NessusSuSE Local Security Checks
high
149080SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1341-1)NessusSuSE Local Security Checks
medium
148919Amazon Linux 2 : kernel (ALAS-2021-1627)NessusAmazon Linux Local Security Checks
high
148747SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1238-1)NessusSuSE Local Security Checks
critical
148700SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1210-1)NessusSuSE Local Security Checks
high
148698SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1211-1)NessusSuSE Local Security Checks
critical
148674Citrix Hypervisor <= 8.2 LTSR DoS (CTX306565)NessusMisc.
high
148509SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1175-1)NessusSuSE Local Security Checks
medium
148438openSUSE Security Update : the Linux Kernel (openSUSE-2021-532)NessusSuSE Local Security Checks
critical