6.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
12.1%
An internal reference count is held on the buffer pool, incremented every
time a new buffer is created from the pool. The reference count is
maintained as an int; on LP64 systems this can cause the reference count to
overflow if the client creates a large number of wl_shm buffer objects, or
if it can coerce the server to create a large number of external references
to the buffer storage. With the reference count overflowing, a
use-after-free can be constructed on the wl_shm_pool tracking structure,
where values may be incremented or decremented; it may also be possible to
construct a limited oracle to leak 4 bytes of server-side memory to the
attacking client at a time.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | wayland | < 1.16.0-1ubuntu1.1~18.04.4 | UNKNOWN |
ubuntu | 20.04 | noarch | wayland | < 1.18.0-1ubuntu0.1 | UNKNOWN |
ubuntu | 22.04 | noarch | wayland | < 1.20.0-1ubuntu0.1 | UNKNOWN |
ubuntu | 16.04 | noarch | wayland | < 1.12.0-1~ubuntu16.04.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
6.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
12.1%