Ubuntu.comUB:CVE-2020-15852CVE-2020-15852
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
13.3%
An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in
Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O
port permissions of an unrelated task. This occurs because
tss_invalidate_io_bitmap mishandling causes a loss of synchronization
between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux-oem-5.6 | < 5.6.0-1023.23 | UNKNOWN |
References
www.openwall.com/lists/oss-security/2020/07/21/2
xenbits.xen.org/xsa/advisory-329.html
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2
github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2
launchpad.net/bugs/cve/CVE-2020-15852
nvd.nist.gov/vuln/detail/CVE-2020-15852
security-tracker.debian.org/tracker/CVE-2020-15852
www.cve.org/CVERecord?id=CVE-2020-15852
www.openwall.com/lists/oss-security/2020/07/16/1
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
13.3%