CVE-2026-39834
Published: May 26, 2026Last modified: May 29, 2026
Description
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.1 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | buildah | Vulnerable (1.28.0-r1) |
| containerd | Vulnerable (1.6.10-r0) | ||
| podman | Vulnerable (4.3.1-r0) | ||
| skopeo | Vulnerable (1.10.0-r2) | ||
| 25 LTS | buildah | Vulnerable (1.40.0-r0) | |
| containerd | Vulnerable (2.1.1-r0) | ||
| docker-cli-buildx | Vulnerable (0.24.0-r0) | ||
| google-guest-agent | Vulnerable (20250521.00-r0) | ||
| osv-scanner | Vulnerable (2.1.0-r4) | ||
| podman | Vulnerable (5.5.0-r0) | ||
| skopeo | Vulnerable (1.18.0-r2) | ||
| Stream | buildah | Vulnerable (1.31.0-r0) | |
| calicoctl | Vulnerable (3.31.3-r0) | ||
| cilium-cli | Vulnerable (0.19.0-r12) | ||
| containerd | Vulnerable (1.7.2-r1) | ||
| docker-cli-buildx | Vulnerable (0.11.0-r0) | ||
| etcd | Vulnerable (3.6.4-r6) | ||
| google-guest-agent | Vulnerable (20250214.01-r0) | ||
| grype | Vulnerable (0.100.0-r0) | ||
| helm | Vulnerable (3.19.0-r4) | ||
| osv-scanner | Vulnerable (2.1.0-r2) | ||
| podman | Vulnerable (4.5.1-r1) | ||
| skopeo | Vulnerable (1.13.0-r1) |