CVE-2021-3155
This could allow a local attacker to read information that should have been private.
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
Description
snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.26% probability · 18th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-276
- Affected
- canonical/snapd · canonical/ubuntu linux
- Source
- security@ubuntu.com
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85Patch, Third Party Advisory
- https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dccaPatch, Third Party Advisory
- https://ubuntu.com/security/notices/USN-5292-1Patch, Vendor Advisory
- https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85Patch, Third Party Advisory
- https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dccaPatch, Third Party Advisory
- https://ubuntu.com/security/notices/USN-5292-1Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.