Lucene search

K
ubuntucveUbuntu.comUB:CVE-2020-27170
HistoryMar 18, 2021 - 12:00 a.m.

CVE-2020-27170

2021-03-1800:00:00
ubuntu.com
ubuntu.com
44

1.9 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

0.0005 Low

EPSS

Percentile

17.3%

An issue was discovered in the Linux kernel before 5.11.8.
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, aka
CID-f232326f6966. This affects pointer types that do not define a
ptr_limit.

Notes

Author Note
alexmurray According to the upstream advisory, f232326f6966cf2a1d1db7bc917a4ce5f9f55f76 is the minimal fix but the whole series should be applied together
sbeattie kernels before 4.15 are not affected by this.
Rows per page:
1-10 of 561

1.9 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

0.0005 Low

EPSS

Percentile

17.3%