DEBIAN-CVE-2021-34556

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2021-34556
Downstream
DLA-2785-1
Published: 02 Aug 2021, 05:15
Last modified:28 Apr 2026, 20:22

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Aug 2021, 05:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:22
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Systems

  • debian•linux

    < 5.10.46-4 | < 5.10.46-4 | < 5.10.46-4 | < 5.10.46-4

References (1)