5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5 Medium
AI Score
Confidence
High
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0005 Low
EPSS
Percentile
14.8%
An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 9.0 | |
fedora | eq | 32 | |
fedora | eq | 33 | |
fedora | eq | 34 | |
linux_kernel | lt | 5.11.16 |
lists.debian.org/debian-lts-announce/2021/06/msg00019.html
lists.fedoraproject.org/archives/list/[email protected]/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/
lists.fedoraproject.org/archives/list/[email protected]/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/
lists.fedoraproject.org/archives/list/[email protected]/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/
www.kernel.org
www.openwall.com/lists/oss-security/2021/04/18/4
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5 Medium
AI Score
Confidence
High
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0005 Low
EPSS
Percentile
14.8%