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CVE-2020-11935
aufs: improperly managed inode reference counts in the vfsub_dentry_open() method
Medium4.4EPSS 0.20%
- Published
- Updated
- Reserved
- Assigned by
- canonical
Description
It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack.
Timeline
ID reserved
By canonical
- 3 years later
· 3 years later
Published
- 16 months later
· 16 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 |
|---|---|---|---|
| canonicalCNA (assigner) | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.
Weakness
Affected products
Ubuntu · Linux kernel (aufs filesystem module)
- unaffected 4.4.0-186.216 – < 4.4*
- unaffected 4.15.0-112.113 – < 4.15*
- unaffected 5.4.0-42.46 – < 5.4*
References (2)
- Ubuntu Security CVE-2020-11935 (opens in a new tab)vendor-advisoryx_transferred
- Launchpad Bug 1873074 (opens in a new tab)vendor-advisoryx_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-2020-11935)Record last updated .