CVE-2020-5291

highpriority · track · 31EPSS 0.009 · 60 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.90% (60th) EPSS

CVSS 8.5 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the `bwrap --userns2` option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: * Debian testing/unstable, if unprivileged user namespaces enabled (not default) * Debian buster-backports, if unprivileged user namespaces enabled (not default) * Arch if using `linux-hardened`, if unprivileged user namespaces enabled (not default) * Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update.

cvss

Technical severity, 0–10. One row per scoring source.

8.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.08.5highAV:N/AC:M/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 6.8 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.7highAV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.2highCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 0.8 · impact 5.8

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269USprimaryCWE-269USCWE-648USCWE-648US

affected products (10)

Products and version ranges known to be affected.

containers bubblewrap≤ < 0.4.1enisa_euvdEU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.9fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition для «Эльбрус»≤ 8.1 «Ленинград»fstec_bduRU
Сообщество свободного программного обеспечения Bubblewrap≤ 0.4.1fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
archlinux arch linuxall versionsnvdUScpe:2.3:o:archlinux:arch_linux:*:*:*:*:*:*:*:*
centos centos= 7.0nvdUScpe:2.3:o:centos:centos:*:*:*:*:*:*:*:*
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
projectatomic bubblewrap< 0.4.1nvdUScpe:2.3:a:projectatomic:bubblewrap:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-03-31modified 2026-06-17

related (6,669)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-102490US	high7.8OT critical	0.86% (58th)	KEV	2026-09-30
Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to…
CVE-2026-84869US	—OT critical	0.92% (60th)	KEV	2026-09-08
A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circum…
CVE-2026-46817US	—OT critical	12.3% (96th)	KEV	2026-05-28
Vulnerability in the Oracle Payments product of Oracle E-Business Suite (component: File Transmission). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable…
CVE-2026-21533US	—OT critical	4.18% (91st)	KEV	2026-02-10
Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.
CVE-2024-57726US	critical9.9OT critical	66.4% (99th)	KEV	2025-01-15
SimpleHelp remote support software v5.5.7 and before has a vulnerability that allows low-privileges technicians to create API keys with excessive permissions. These API keys can be…

+6664 more

references (7)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan