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ubuntucveUbuntu.comUB:CVE-2020-27171
HistoryMar 18, 2021 - 12:00 a.m.

CVE-2020-27171

2021-03-1800:00:00
ubuntu.com
ubuntu.com
29

6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

3.6 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0005 Low

EPSS

Percentile

14.7%

JSON

An issue was discovered in the Linux kernel before 5.11.8.
kernel/bpf/verifier.c has an off-by-one error (with a resultant integer
underflow) affecting 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-10d2bb2e6b1d.

Notes

Author Note
alexmurray According to the upstream advisory, 10d2bb2e6b1d8c4576c56a748f697dbeb8388899 is the minimal fix but the whole series should be applied together
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-140.144UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-70.78UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-48.54UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1097.104UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1041.43UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1027.29UNKNOWN
ubuntu14.04noarchlinux-aws< anyUNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1041.43~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1097.104~16.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1043.45UNKNOWN
Rows per page:
1-10 of 541

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6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

3.6 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0005 Low

EPSS

Percentile

14.7%

JSON
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