VDB
CVE-2020-11935
CVE-2020-11935
PUBLISHED
CVSS 4.4 MEDIUM
aufs: improperly managed inode reference counts in the vfsub_dentry_open() method
Reported by canonical · Published April 7, 2023
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux-azure-5.4 | Ubuntu:18.04:LTS | 5.4.0-1022.22~18.04.1 |
| linux-riscv | Ubuntu:20.04:LTS | 5.4.0-30.34 |
| linux-raspi2-5.3 | Ubuntu:18.04:LTS | 5.3.0-1030.32~18.04.2 |
| linux-kvm | Ubuntu:16.04:LTS | 4.4.0-1077.84 |
| linux-aws | Ubuntu:Pro:14.04:LTS | 4.4.0-1075.79 |
| linux-aws | Ubuntu:20.04:LTS | 5.4.0-1020.20 |
| linux-gcp | Ubuntu:16.04:LTS | 4.15.0-1080.90~16.04.1 |
| linux-raspi2 | Ubuntu:18.04:LTS | 4.15.0-1067.71 |
| linux-gke-5.3 | Ubuntu:18.04:LTS | 5.3.0-1032.34~18.04.1 |
| linux-kvm | Ubuntu:18.04:LTS | 4.15.0-1071.72 |
| linux-aws | Ubuntu:16.04:LTS | 4.4.0-1111.123 |
| linux | Ubuntu:18.04:LTS | 4.15.0-112.113 |
4 more packages have a fixed version. See every fix in Lookup.
Risk scores
CVSS 3.1
4.4
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu | Linux kernel (aufs filesystem module) | 4.4.0-186.216, 4.15.0-112.113, 5.4.0-42.46 |
| Ubuntu | Linux kernel (aufs filesystem module) | 4.4.0-186.216, 4.15.0-112.113, 5.4.0-42.46 |
Timeline
- Jun 29, 2020 CVE Published
- Apr 7, 2023 EPSS Score (30 in total, the first dated here)
- Apr 7, 2023 PoC Published (2 in total, the first dated here)
- Mar 4, 2026 CVE Updated
- Mar 6, 2026 Distribution Patch (5 in total, the first dated here)
- Mar 6, 2026 Security Advisory (6 in total, the first dated here)
- Sep 6, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2020-11935
vulnetix vdb fixes CVE-2020-11935Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2020-11935/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- Ubuntu Security CVE-2020-11935 vendor-advisory
- Launchpad Bug 1873074 vendor-advisory