containerd: Unpack DoS via repeated opaque whiteouts
containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger repeated directory traversals while opaque whiteouts are processed. Pulling or importing the image can consume CPU, delay container startup, and reduce image-pull concurrency for unrelated deployments. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5.
CVE-2026-95838
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-95838
containerd
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "containerd",
"product": "containerd",
"versions": [
{
"status": "affected",
"version": "< 1.7.35"
},
{
"status": "affected",
"version": ">= 2.0.0-beta.0, < 2.0.12"
},
{
"status": "affected",
"version": ">= 2.2.0, < 2.2.8"
},
{
"status": "affected",
"version": ">= 2.3.0, < 2.3.5"
}
]
}
]- Related CVEs
- CVE-2026-95838
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #21307 · Revision 1
- Added to Heist Feed
- Publisher date