CVE-2021-34556
- State
- Published
- Severity
- Not scored
- Published
- Aug 2, 2021
- Updated
- Oct 8, 2026
- Reserved
- Jun 10, 2021
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=f5e81d1117501546b7be050c5fbafa6efd2c722c
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=2039f26f3aca5b0e419b98f65dd36481337b86ee
- http://www.openwall.com/lists/oss-security/2021/08/01/3
- FEDORA-2021-4d4d3866cavendor-advisory
- FEDORA-2021-54ee631709vendor-advisory
- [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security updatemailing-list
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