7.3 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
7.2 High
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.2%
A heap-based buffer over-read vulnerability was found in the X.org server’s
ProcXIGetSelectedEvents() function. This issue occurs when byte-swapped
length values are used in replies, potentially leading to memory leakage
and segmentation faults, particularly when triggered by a client with a
different endianness. This vulnerability could be exploited by an attacker
to cause the X server to read heap memory values and then transmit them
back to the client until encountering an unmapped page, resulting in a
crash. Despite the attacker’s inability to control the specific memory
copied into the replies, the small length values typically stored in a
32-bit integer can result in significant attempted out-of-bounds reads.
Author | Note |
---|---|
mdeslaur | xorg server is actually the xorg-server package the xorg package only contains docs xwayland package contains parts of xorg-server |
leosilva | introduced in xorg-server-1.7.0 |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | xorg-server | < 2:1.19.6-1ubuntu4.15+esm7 | UNKNOWN |
ubuntu | 20.04 | noarch | xorg-server | < 2:1.20.13-1ubuntu1~20.04.16 | UNKNOWN |
ubuntu | 22.04 | noarch | xorg-server | < 2:21.1.4-2ubuntu1.7~22.04.9 | UNKNOWN |
ubuntu | 23.10 | noarch | xorg-server | < 2:21.1.7-3ubuntu2.8 | UNKNOWN |
ubuntu | 24.04 | noarch | xorg-server | < 2:21.1.12-1ubuntu1 | UNKNOWN |
ubuntu | 14.04 | noarch | xorg-server | < 2:1.15.1-0ubuntu2.11+esm11 | UNKNOWN |
ubuntu | 16.04 | noarch | xorg-server | < 2:1.18.4-0ubuntu0.12+esm12 | UNKNOWN |
ubuntu | 16.04 | noarch | xorg-server-hwe-16.04 | < any | UNKNOWN |
ubuntu | 18.04 | noarch | xorg-server-hwe-18.04 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | xwayland | < 2:22.1.1-1ubuntu0.12 | UNKNOWN |
7.3 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
7.2 High
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.2%