Linux · 
Amazon Linux · Security advisory · May 25, 2026
Amazon Linux · Security advisory · May 25, 2026ALAS2023-2026-1756: Security update for 12 packages
ALAS2023-2026-1756, released May 25, 2026, fixes 10 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
10
1 rated Critical
Exploited
0
None reported
Highest CVSS
10.0
Base score, 0 to 10
Highest EPSS
0.0142
73rd percentile
Priority of the 10 CVEs
Patch now 0
Urgent 1
High 7
Routine 2
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| python3-unbound | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| python3-unbound-debuginfo | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-anchor | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-anchor-debuginfo | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-debuginfo | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-debugsource | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-devel | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-libs | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-libs-debuginfo | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-utils | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
| unbound-utils-debuginfo | amzn 2023 | 1.17.1-1.amzn2023.0.12 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-33278 | Possible arbitrary code execution during DNSSEC validation | 9.8 | 0.0142 | None reported |
| High | CVE-2026-42944 | Heap overflow with multiple NSID, COOKIE, PADDING EDNS options | 8.1 | 0.0084 | None reported |
| High | CVE-2026-42959 | Crash during DNSSEC validation of malicious content | 8.1 | 0.0081 | None reported |
| High | CVE-2026-41292 | Long list of incoming EDNS options degrades performance | 7.5 | 0.0075 | None reported |
| High | CVE-2026-44390 | Unbounded name compression in certain cases causes degradation of service | 7.5 | 0.0065 | None reported |
| High | CVE-2026-42534 | Jostle logic bypass degrades resolution performance | 7.5 | 0.0060 | None reported |
| High | CVE-2026-42960 | Possible cache poisoning via promiscuous records for the authority section | 10.0 | 0.0026 | None reported |
| High | CVE-2026-40622 | Another 'ghost domain names' attack variant | 7.5 | 0.0014 | None reported |
| Routine | CVE-2026-42923 | Degradation of service with unbounded NSEC3 hash calculations | 5.3 | 0.0034 | None reported |
| Routine | CVE-2026-44608 | Use after free and crash under special conditions in RPZ code | 5.9 | 0.0026 | None reported |
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