arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect…
Priority LOW 26CWE-200Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 10 fixed, 4 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.
Summary
arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests.
Why it matters now
EPSS 0.00551 46th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 10 fixed, 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.18.1 | Vulnerable | Linux |
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.18.1 Vulnerable ·Linux
Remediation
Red Hat 2 advisories
- RHSA-2019:2043 Released 2019-08-07 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1062.rt56.1022.el7, kernel-rt-debug-3.10.0-1062.rt56.1022.el7, kernel-rt-debug-devel-3.10.0-1062.rt56.1022.el7 +4
- Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1062.rt56.1022.el7, kernel-rt-debug-3.10.0-1062.rt56.1022.el7, kernel-rt-debug-devel-3.10.0-1062.rt56.1022.el7 +7
- RHSA-2019:2029 Released 2019-08-06 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1062.el7, kernel-3.10.0-1062.el7, kernel-abi-whitelists-3.10.0-1062.el7 +8
- Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1062.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1062.el7, kernel-3.10.0-1062.el7, kernel-abi-whitelists-3.10.0-1062.el7 +8
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1062.el7
- Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1062.el7, kernel-3.10.0-1062.el7, kernel-abi-whitelists-3.10.0-1062.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1062.el7, kernel-tools-libs-devel-3.10.0-1062.el7
- Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1062.el7, kernel-3.10.0-1062.el7, kernel-abi-whitelists-3.10.0-1062.el7 +8
- Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1062.el7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise MRG 2 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux for Real Time (v. 7) | Fixed | RHSA-2019:2043 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) | Fixed | RHSA-2019:2043 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2018-15594
- 2026-10-03 Alias added: GHSA-9jqj-q3v6-cv9h
References
Patch 2
Advisory 14
- USN-3776-1
- https://twitter.com/grsecurity/status/1029324426142199808
- USN-3776-2
- USN-3777-1
- USN-3775-1
- [debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security update
- DSA-4308
- USN-3775-2
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1
- USN-3777-2
- USN-3777-3
- openSUSE-SU-2019:1407
- RHSA-2019:2043
- RHSA-2019:2029
Sources
- CVE-2018-15594 · CVE Program
- CVE-2018-15594 · NVD
- FIRST EPSS
- GHSA-9jqj-q3v6-cv9h · GitHub Advisory Database · CC BY 4.0
- CVE-2018-15594 · Red Hat security data · CC BY 4.0
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