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
11.0%
In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu
5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() installs an fd
referencing a file from the lower filesystem without taking an additional
reference to that file. After the btrfs ioctl completes this fd is closed,
which then puts a reference to that file, leading to a refcount underflow.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 19.10 | noarch | linux | < 5.3.0-22.24 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-kvm | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-aws | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-azure | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-gcp | < 5.3.0-1008.9 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-oracle | < 5.3.0-1006.7 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-raspi2 | < 5.3.0-1012.14 | UNKNOWN |
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
11.0%