CVE-2018-19333 - pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled

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CRITICAL

pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled

Published Nov 17, 2018

9.8

CRITICAL

CVSS 3.0

EPSS 0.81%

Description

pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.81% 0.00813

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.

EPSS probability 0.00813

Score over time

2021-2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed. Showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 4, 2026	0.81% (0.00813)	55.52th	v5 (v2026.06.15)
Sep 20, 2026	0.81% (0.00813)	55.46th	v5 (v2026.06.15)
Jul 20, 2024	0.33% (0.00331)	71.36th	v3 (v2023.03.01)
Jul 6, 2024	0.33% (0.00331)	71.25th	v3 (v2023.03.01)
Apr 9, 2024	0.31% (0.00311)	69.65th	v3 (v2023.03.01)
Feb 8, 2024	0.28% (0.00283)	67.70th	v3 (v2023.03.01)
Sep 3, 2023	0.28% (0.00283)	64.56th	v3 (v2023.03.01)
Mar 7, 2023	0.24% (0.00244)	60.48th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.26% (0.00258)	2.22th	v5 (v2026.06.15)
Apr 14, 2021	0.26% (0.00258)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (2)

https://github.com/google/gvisor/commit/0e277a39c8b6f905e289b75e8ad0594e6b3562ca
x_refsource_MISCPatchThird Party Advisory
https://justi.cz/security/2018/11/14/gvisor-lpe.html
x_refsource_MISCExploitThird Party Advisory

Link	Providers	Tags
https://github.com/google/gvisor/commit/0e277a39c8b6f905e289b75e8ad0594e6b3562ca		x_refsource_MISCPatchThird Party Advisory
https://justi.cz/security/2018/11/14/gvisor-lpe.html		x_refsource_MISCExploitThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Nov 17, 2018

Updated Aug 5, 2024

Reserved Nov 17, 2018

Link CVE-2018-19333

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-19333

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-19333