CVE Vulnerability

CVE-2021-33624

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

4.7 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact NONE

Availability Impact NONE

Scope

4.7 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/06/21/1 Mailing List Exploit
https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Issue Tracking Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Information

Published : 2021-06-23 04:15

Updated : 2021-11-12 08:15

NVD link : CVE-2021-33624

Mitre link : CVE-2021-33624

Products Affected
No products.
CWE
CWE-203