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SUSE containerd Important Denial of Service Fix 2026-2640-1

suse
Calendar Grey June 26, 2026
Dist Suse Esm H88
An essential SUSE update for containerd fixes critical issues allowing privilege escalation and potential DoS.
An update that solves four vulnerabilities can now be installed.

Summary

## This update for containerd fixes the following issues * CVE-2026-33186: google.golang.org/grpc: authorization bypass due to improper validation of the HTTP/2 :path pseudo- header (bsc#1260296). * CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE (bsc#1265794). * CVE-2026-34986: github.com/go-jose/go-jose/v3: crafted JWE input with a missing encrypted key can lead to a denial of service (bsc#1262948). * CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266640). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Topics%20covered

Topics Covered

security advisory denial of service SuSE important authorization bypass HTTP transport

References

* bsc#1260296

* bsc#1262948

* bsc#1265794

* bsc#1266640

Cross-

* CVE-2026-33186

* CVE-2026-33814

* CVE-2026-34986

* CVE-2026-39821

CVSS scores:

* CVE-2026-33186 ( SUSE ): 8.6

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

* CVE-2026-33186 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

* CVE-2026-33186 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

* CVE-2026-33814 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-33814 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-33814 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-34986 ( SUSE ): 8.7

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2640-1
Release Date: 2026-06-26T07:06:35Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE important authorization bypass HTTP transport

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