SB2026090615 - Multiple vulnerabilities in containerd

Description

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2026-53495)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the containerd CRI plugin ExecSync I/O drain phase when handling ExecSync calls involving long-lived background child processes. A local user can repeatedly invoke ExecSync calls with long-lived background child processes to cause a denial of service.

Only Linux systems with the CRI plugin enabled are affected.

2) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the layer unpack handler when processing a maliciously crafted image layer. A remote attacker can provide a maliciously crafted image for pulling or importing to cause a denial of service.

User interaction is required to pull or import the crafted image.

Remediation

Install update from vendor's website.

References

• https://github.com/containerd/containerd/security/advisories/GHSA-7jxh-36q5-gcqv
• https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4