How severe is CVE-2020-27352?

CVE-2020-27352 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27352 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27352?

CVE-2020-27352 primarily affects Canonical Snapd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-27352?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2020-27352 have an EU (EUVD) identifier?

Yes. CVE-2020-27352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-19864.

When was CVE-2020-27352 published?

CVE-2020-27352 was published on 2024-06-21 and last updated on 2026-06-17.

CVE-2020-27352

CVE-2020-27352 is a critical-severity vulnerability in Canonical Snapd with a CVSS 3.x base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-19864
Weakness: CWE-269
Affected product: Canonical Snapd
Published: 2024-06-21
Last modified: 2026-06-17

Description

When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.

Frequently asked questions

What is CVE-2020-27352?: When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.
How severe is CVE-2020-27352?: CVE-2020-27352 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27352 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27352?: CVE-2020-27352 primarily affects Canonical Snapd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-27352?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2020-27352 have an EU (EUVD) identifier?: Yes. CVE-2020-27352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-19864.
When was CVE-2020-27352 published?: CVE-2020-27352 was published on 2024-06-21 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*

More vulnerabilities in Canonical Snapd

CVE-2023-1523 — Critical (CVSS 10.0): Using the TIOCLINUX ioctl request, a malicious snap could inject contents into the input of the controlling terminal…
CVE-2019-7304 — Critical (CVSS 9.8): Canonical snapd before version 2.37.1 incorrectly performed socket owner validation, allowing an attacker to run…
CVE-2021-4120 — High (CVSS 8.2): snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the…
CVE-2024-5138 — High (CVSS 8.1): The snapctl component within snapd allows a confined snap to interact with the snapd daemon to take certain privileged…
CVE-2022-3328 — High (CVSS 7.8): Race condition in snap-confine's must_mkdir_and_open_with_perms()
CVE-2021-44731 — High (CVSS 7.8): A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap.…

All CVEs affecting Canonical Snapd →

Other CWE-269 (Improper Privilege Management) vulnerabilities

CVE-2026-31852 — Critical (CVSS 10.0): Jellyfin is an open-source media system. The code-quality.yml GitHub Actions workflow in jellyfin/jellyfin-ios is…
CVE-2025-20282 — Critical (CVSS 10.0): A vulnerability in an internal API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to…
CVE-2025-0505 — Critical (CVSS 10.0): On Arista CloudVision systems (virtual or physical on-premise deployments), Zero Touch Provisioning can be used to gain…
CVE-2023-48418 — Critical (CVSS 10.0): In checkDebuggingDisallowed of DeviceVersionFragment.java, there is a possible way to access adb before SUW…
CVE-2023-48419 — Critical (CVSS 10.0): An attacker in the wifi vicinity of a target Google Home can spy on the victim, resulting in Elevation of Privilege
CVE-2023-31273 — Critical (CVSS 10.0): Protection mechanism failure in some Intel DCM software before version 5.2 may allow an unauthenticated user to…

Browse all CWE-269 (Improper Privilege Management) vulnerabilities →