CVE-2020-27171
- State
- Published
- Severity
- Not scored
- Published
- Mar 20, 2021
- Updated
- Oct 8, 2026
- Reserved
- Oct 16, 2020
Description
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8
- https://www.openwall.com/lists/oss-security/2021/03/19/3
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=10d2bb2e6b1d8c4576c56a748f697dbeb8388899
- FEDORA-2021-f0181b8085vendor-advisory
- FEDORA-2021-e49da8a226vendor-advisory
- [oss-security] 20210324 Re: [CVE-2020-27171] Numeric error when restricting speculative pointer arithmetic allows unprivileged local users to leak content of kernel memorymailing-list
- FEDORA-2021-9503fffad9vendor-advisory
- [debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security updatemailing-list
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
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