CVE-2018-3639
MEDIUM 5.5EPSS 60.6%
Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.
- CVSS v3.1
- 5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS v3.1
- 5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS v2.0
- 2.1 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N - EPSS
- 60.63% chance of exploitation in the next 30 days, 99th percentile
- Published
- 2018-05-22
- Updated
- 2026-05-29
Proof-of-concept exploits (5)
- C0dak/linux-exploit0★ · 2018-08-21
- Shuiliusheng/CVE-2018-3639-specter-v4-1★ · 2019-06-26
- jinb-park/linux-exploit14★ · 2019-06-12
- mmxsrup/CVE-2018-363915★ · 2021-10-22
- v-lavrentikov/meltdown-spectre2★ · 2026-08-13