Linux · Security advisory · September 10, 2026
RHSA-2026:65534: image-builder security update
RHSA-2026:65534, released September 10, 2026, fixes 14 CVEs in image-builder (version 52.1-1.el10_2.2). None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
14
1 rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0183
79th percentile
Priority of the 14 CVEs
Patch now 0
Urgent 1
High 13
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| image-builder | RHEL 10 | 52.1-1.el10_2.2 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-39821 | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna | 10.0 | 0.0183 | None reported | |
| High | CVE-2026-33811 | Crash when handling long CNAME response in net | 8.8 | 0.0088 | None reported | |
| High | CVE-2026-42499 | Quadratic string concatenation in consumePhrase in net/mail | 8.8 | 0.0080 | None reported | |
| High | CVE-2026-39820 | Quadratic string concatentation in consumeComment in net/mail | 8.8 | 0.0078 | None reported | |
| High | CVE-2026-32280 | Unexpected work during chain building in crypto/x509 | 9.1 | 0.0063 | None reported | |
| High | CVE-2026-33818 | Enforce maximum recursion depth in encoding/asn1 | 8.8 | 0.0057 | None reported | |
| High | CVE-2026-56853 | Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http | 8.8 | 0.0057 | None reported | |
| High | CVE-2026-56859 | Add recursion depth guard during decode in encoding/xml | 8.8 | 0.0057 | None reported | |
| High | CVE-2026-56862 | Limit handshake messages we are willing to accept post-handshake in crypto/tls | 8.8 | 0.0057 | None reported | |
| High | CVE-2026-42504 | Quadratic complexity in WordDecoder.DecodeHeader in mime | 8.8 | 0.0056 | None reported | |
| High | CVE-2026-56860 | Avoid quadratic complexity in resolvePath in net/url | 8.8 | 0.0055 | None reported | |
| High | CVE-2026-32281 | Inefficient policy validation in crypto/x509 | 9.1 | 0.0036 | None reported | |
| High | CVE-2026-33810 | Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509 | 9.1 | 0.0035 | None reported | |
| High | CVE-2026-56858 | Fix Javascript regexp context tracking in html/template | 8.8 | 0.0031 | None reported |
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