RHSA-2026:98403 - Security Advisory

Topic

An update for oci-delta is now available for Red Hat Enterprise Linux 10.

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.

Description

Creates and applies delta files between OCI image archives for bootc systems. Delta files are significantly smaller than full OCI archives because they exclude layers already present on the target system and use binary diffs (tar-diff) for changed layers.

Security Fix(es):

• encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
• crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031)

Bug Fix(es) and Enhancement(s):

• Update oci-delta to v0.3.1 for RHEL 10.3.z async release (JIRA:RHEL-290036)

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

Solution

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

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

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64

Fixes

• BZ - 2515815 - CVE-2026-33818 encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal
• BZ - 2548336 - CVE-2026-97031 crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references
• RHEL-290036 - Update oci-delta to v0.3.1 for RHEL 10.3.z async release

CVEs

• CVE-2026-33818
• CVE-2026-97031

References

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