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CVE-2021-3899
There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute…
High7.8EPSS 0.38%
- Published
- Updated
- Reserved
- Assigned by
- canonical
Description
There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute arbitrary code as root.
Timeline
ID reserved
By canonical
- 3 years later
· 3 years later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.38% · top 67% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected < 2.21.0
References (3)
- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1948376 (opens in a new tab)issue-trackingx_transferred
- https://ubuntu.com/security/notices/USN-5427-1 (opens in a new tab)vendor-advisoryx_transferred
- https://www.cve.org/CVERecord?id=CVE-2021-3899 (opens in a new tab)issue-trackingx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3899)Record last updated .