CVE-2018-9056

Exp

Systems with microprocessors utilizing speculative execution may allow unauthorized disclosure of information to an attacker with local user access via a side-channel attack on the directional branch predictor, as demonstrated by a pattern history table (PHT), aka BranchScope.

Published: 2018-03-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-9056 is rated Exploit Available (54.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.70%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-9056

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-9056

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.12% 0.70% +0.57%
2 2025-03-30 0.29% 0.12% -0.16%
3 2025-03-29 — 0.29% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-9056

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.6 3.0 MEDIUM
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.1 4.0 [email protected]
4.7 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.4 6.9 [email protected]

Weakness enumeration for CVE-2018-9056

OS Trackers for CVE-2018-9056

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2018-9056
suse medium CVE-2018-9056 severity moderate: SUSE including 10 source package names (kernel-default, kernel-default-base, …), 134 product×package rows across 35 product lines (SUSE CaaS Platform 4.5, SUSE Enterprise Storage 7, … (35 product lines)): Known Not Affected 134. https://www.suse.com/security/cve/CVE-2018-9056/
ubuntu medium CVE-2018-9056 medium priority: Ubuntu has no source package entries, 0 status rows across 0 suites (none): no status rows. https://ubuntu.com/security/CVE-2018-9056

Affected software / configurations for CVE-2018-9056

Vendor Product Version Raw CPE
intel atom_c c2308 cpe:2.3:h:intel:atom_c:c2308:*:*:*:*:*:*:*
intel atom_c c2316 cpe:2.3:h:intel:atom_c:c2316:*:*:*:*:*:*:*
intel atom_c c2338 cpe:2.3:h:intel:atom_c:c2338:*:*:*:*:*:*:*
intel atom_c c2350 cpe:2.3:h:intel:atom_c:c2350:*:*:*:*:*:*:*
intel atom_c c2358 cpe:2.3:h:intel:atom_c:c2358:*:*:*:*:*:*:*
intel atom_c c2508 cpe:2.3:h:intel:atom_c:c2508:*:*:*:*:*:*:*
intel atom_c c2516 cpe:2.3:h:intel:atom_c:c2516:*:*:*:*:*:*:*
intel atom_c c2518 cpe:2.3:h:intel:atom_c:c2518:*:*:*:*:*:*:*
intel atom_c c2530 cpe:2.3:h:intel:atom_c:c2530:*:*:*:*:*:*:*
intel atom_c c2538 cpe:2.3:h:intel:atom_c:c2538:*:*:*:*:*:*:*
intel atom_c c2550 cpe:2.3:h:intel:atom_c:c2550:*:*:*:*:*:*:*
intel atom_c c2558 cpe:2.3:h:intel:atom_c:c2558:*:*:*:*:*:*:*
intel atom_c c2718 cpe:2.3:h:intel:atom_c:c2718:*:*:*:*:*:*:*
intel atom_c c2730 cpe:2.3:h:intel:atom_c:c2730:*:*:*:*:*:*:*
intel atom_c c2738 cpe:2.3:h:intel:atom_c:c2738:*:*:*:*:*:*:*
intel atom_c c2750 cpe:2.3:h:intel:atom_c:c2750:*:*:*:*:*:*:*
intel atom_c c2758 cpe:2.3:h:intel:atom_c:c2758:*:*:*:*:*:*:*
intel atom_c c3308 cpe:2.3:h:intel:atom_c:c3308:*:*:*:*:*:*:*
intel atom_c c3338 cpe:2.3:h:intel:atom_c:c3338:*:*:*:*:*:*:*
intel atom_c c3508 cpe:2.3:h:intel:atom_c:c3508:*:*:*:*:*:*:*
intel atom_c c3538 cpe:2.3:h:intel:atom_c:c3538:*:*:*:*:*:*:*
intel atom_c c3558 cpe:2.3:h:intel:atom_c:c3558:*:*:*:*:*:*:*
intel atom_c c3708 cpe:2.3:h:intel:atom_c:c3708:*:*:*:*:*:*:*
intel atom_c c3750 cpe:2.3:h:intel:atom_c:c3750:*:*:*:*:*:*:*
intel atom_c c3758 cpe:2.3:h:intel:atom_c:c3758:*:*:*:*:*:*:*
intel atom_c c3808 cpe:2.3:h:intel:atom_c:c3808:*:*:*:*:*:*:*
intel atom_c c3830 cpe:2.3:h:intel:atom_c:c3830:*:*:*:*:*:*:*
intel atom_c c3850 cpe:2.3:h:intel:atom_c:c3850:*:*:*:*:*:*:*
intel atom_c c3858 cpe:2.3:h:intel:atom_c:c3858:*:*:*:*:*:*:*
intel atom_c c3950 cpe:2.3:h:intel:atom_c:c3950:*:*:*:*:*:*:*
intel atom_c c3955 cpe:2.3:h:intel:atom_c:c3955:*:*:*:*:*:*:*
intel atom_c c3958 cpe:2.3:h:intel:atom_c:c3958:*:*:*:*:*:*:*
intel atom_e e3805 cpe:2.3:h:intel:atom_e:e3805:*:*:*:*:*:*:*
intel atom_e e3815 cpe:2.3:h:intel:atom_e:e3815:*:*:*:*:*:*:*
intel atom_e e3825 cpe:2.3:h:intel:atom_e:e3825:*:*:*:*:*:*:*
intel atom_e e3826 cpe:2.3:h:intel:atom_e:e3826:*:*:*:*:*:*:*
intel atom_e e3827 cpe:2.3:h:intel:atom_e:e3827:*:*:*:*:*:*:*
intel atom_e e3845 cpe:2.3:h:intel:atom_e:e3845:*:*:*:*:*:*:*
intel atom_x3 c3130 cpe:2.3:h:intel:atom_x3:c3130:*:*:*:*:*:*:*
intel atom_x3 c3200rk cpe:2.3:h:intel:atom_x3:c3200rk:*:*:*:*:*:*:*
intel atom_x3 c3205rk cpe:2.3:h:intel:atom_x3:c3205rk:*:*:*:*:*:*:*
intel atom_x3 c3230rk cpe:2.3:h:intel:atom_x3:c3230rk:*:*:*:*:*:*:*
intel atom_x3 c3235rk cpe:2.3:h:intel:atom_x3:c3235rk:*:*:*:*:*:*:*
intel atom_x3 c3265rk cpe:2.3:h:intel:atom_x3:c3265rk:*:*:*:*:*:*:*
intel atom_x3 c3295rk cpe:2.3:h:intel:atom_x3:c3295rk:*:*:*:*:*:*:*
intel atom_x3 c3405 cpe:2.3:h:intel:atom_x3:c3405:*:*:*:*:*:*:*
intel atom_x3 c3445 cpe:2.3:h:intel:atom_x3:c3445:*:*:*:*:*:*:*
intel atom_z z2420 cpe:2.3:h:intel:atom_z:z2420:*:*:*:*:*:*:*
intel atom_z z2460 cpe:2.3:h:intel:atom_z:z2460:*:*:*:*:*:*:*
intel atom_z z2480 cpe:2.3:h:intel:atom_z:z2480:*:*:*:*:*:*:*
intel atom_z z2520 cpe:2.3:h:intel:atom_z:z2520:*:*:*:*:*:*:*
intel atom_z z2560 cpe:2.3:h:intel:atom_z:z2560:*:*:*:*:*:*:*
intel atom_z z2580 cpe:2.3:h:intel:atom_z:z2580:*:*:*:*:*:*:*
intel atom_z z2760 cpe:2.3:h:intel:atom_z:z2760:*:*:*:*:*:*:*
intel atom_z z3460 cpe:2.3:h:intel:atom_z:z3460:*:*:*:*:*:*:*
intel atom_z z3480 cpe:2.3:h:intel:atom_z:z3480:*:*:*:*:*:*:*
intel atom_z z3530 cpe:2.3:h:intel:atom_z:z3530:*:*:*:*:*:*:*
intel atom_z z3560 cpe:2.3:h:intel:atom_z:z3560:*:*:*:*:*:*:*
intel atom_z z3570 cpe:2.3:h:intel:atom_z:z3570:*:*:*:*:*:*:*
intel atom_z z3580 cpe:2.3:h:intel:atom_z:z3580:*:*:*:*:*:*:*
intel atom_z z3590 cpe:2.3:h:intel:atom_z:z3590:*:*:*:*:*:*:*
intel atom_z z3735d cpe:2.3:h:intel:atom_z:z3735d:*:*:*:*:*:*:*
intel atom_z z3735e cpe:2.3:h:intel:atom_z:z3735e:*:*:*:*:*:*:*
intel atom_z z3735f cpe:2.3:h:intel:atom_z:z3735f:*:*:*:*:*:*:*
intel atom_z z3735g cpe:2.3:h:intel:atom_z:z3735g:*:*:*:*:*:*:*
intel atom_z z3736f cpe:2.3:h:intel:atom_z:z3736f:*:*:*:*:*:*:*
intel atom_z z3736g cpe:2.3:h:intel:atom_z:z3736g:*:*:*:*:*:*:*
intel atom_z z3740 cpe:2.3:h:intel:atom_z:z3740:*:*:*:*:*:*:*
intel atom_z z3740d cpe:2.3:h:intel:atom_z:z3740d:*:*:*:*:*:*:*
intel atom_z z3745 cpe:2.3:h:intel:atom_z:z3745:*:*:*:*:*:*:*
intel atom_z z3745d cpe:2.3:h:intel:atom_z:z3745d:*:*:*:*:*:*:*
intel atom_z z3770 cpe:2.3:h:intel:atom_z:z3770:*:*:*:*:*:*:*
intel atom_z z3770d cpe:2.3:h:intel:atom_z:z3770d:*:*:*:*:*:*:*
intel atom_z z3775 cpe:2.3:h:intel:atom_z:z3775:*:*:*:*:*:*:*
intel atom_z z3775d cpe:2.3:h:intel:atom_z:z3775d:*:*:*:*:*:*:*
intel atom_z z3785 cpe:2.3:h:intel:atom_z:z3785:*:*:*:*:*:*:*
intel atom_z z3795 cpe:2.3:h:intel:atom_z:z3795:*:*:*:*:*:*:*
intel celeron_j j1750 cpe:2.3:h:intel:celeron_j:j1750:*:*:*:*:*:*:*
intel celeron_j j1800 cpe:2.3:h:intel:celeron_j:j1800:*:*:*:*:*:*:*
intel celeron_j j1850 cpe:2.3:h:intel:celeron_j:j1850:*:*:*:*:*:*:*

References for CVE-2018-9056

cvelogic Threat Intelligence