CVE-2020-27170
- 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 performs undesirable 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-f232326f6966. This affects pointer types that do not define a ptr_limit.
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/2021/03/19/2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5f9f55f76
- FEDORA-2021-f0181b8085vendor-advisory
- FEDORA-2021-e49da8a226vendor-advisory
- [oss-security] 20210324 Re: [CVE-2020-27170] Protection against speculatively out-of-bounds loads in the Linux kernel can be bypassed by 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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