RHSA-2026:28047 - Security Advisory

주제

An update for etcd is now available for Red Hat OpenStack Platform 17.1
(Wallaby).

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

설명

etcd is a highly-available key value store for shared configuration.

Security Fix(es):

• net/url: Memory exhaustion in query parameter parsing in net/url

(CVE-2025-61726)

• golang: Denial of Service due to excessive resource consumption via

crafted certificate (CVE-2025-61729)

• Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679)
• Incorrect enforcement of email constraints in crypto/x509

(CVE-2026-27137)

• crypto/tls: golang: Go: Denial of Service vulnerability in certificate

chain building (CVE-2026-32280)

• golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update

messages (CVE-2026-32283)

• google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to

improper HTTP/2 path validation (CVE-2026-33186)

• golang: Go crypto/x509: Certificate validation bypass due to incorrect

DNS constraint application (CVE-2026-33810)

• crypto/tls: Incorrect certificate validation during TLS session

resumption (CVE-2025-68121)

• internal/syscall/unix: Root.Chmod can follow symlinks out of the root

(CVE-2026-32282)

• etcd: Authorization bypass allows information disclosure and denial of

service (CVE-2026-33413)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page listed in the References section.

솔루션

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

영향을 받는 제품

• Red Hat OpenStack 17.1 for RHEL 9 x86_64

수정

• BZ - 2418462 - CVE-2025-61729 crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
• BZ - 2434432 - CVE-2025-61726 golang: net/url: Memory exhaustion in query parameter parsing in net/url
• BZ - 2437111 - CVE-2025-68121 crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption
• BZ - 2445356 - CVE-2026-25679 net/url: Incorrect parsing of IPv6 host literals in net/url
• BZ - 2449833 - CVE-2026-33186 google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation
• BZ - 2451728 - CVE-2026-33413 etcd: etcd: Authorization bypass allows information disclosure and denial of service
• BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root
• BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages
• BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building

CVE

• CVE-2025-61726
• CVE-2025-61729
• CVE-2025-68121
• CVE-2026-25679
• CVE-2026-27137
• CVE-2026-32280
• CVE-2026-32282
• CVE-2026-32283
• CVE-2026-33186
• CVE-2026-33413
• CVE-2026-33810

참조

• https://access.redhat.com/security/updates/classification/#important