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CVE-2021-34556

CVSS v3.1 5.5 (Medium)
55% Progress
CVSS v2.0 2.1 (Low)
21% Progress
EPSS 0.05 % (17th)
0.05% Progress
Affected Products 3
Advisories 30
Info CVSS EPSS CAPEC Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.

Weaknesses
CWE-203
Observable Discrepancy
CVE Status
PUBLISHED
CNA
MITRE
Published Date
2021-08-02 05:15:07
(3 years ago)
Updated Date
2023-11-07 03:36:01
(10 months ago)

Affected Products

Debian

Fedoraproject

Linux

Configuration #1

    CPE23 From Up To
  Linux Kernel 5.13.7 and prior versions cpe:2.3:o:linux:linux_kernel <= 5.13.7

Configuration #2

    CPE23 From Up To
  Fedoraproject Fedora 33 cpe:2.3:o:fedoraproject:fedora:33
  Fedoraproject Fedora 34 cpe:2.3:o:fedoraproject:fedora:34

Configuration #3

    CPE23 From Up To
  Debian Linux 9.0 cpe:2.3:o:debian:debian_linux:9.0