# ALAS2023-2026-2033: Security update for 12 packages ALAS2023-2026-2033, released August 3, 2026, fixes 13 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/fix/linux/alas2023-2026-2033 - Platform: Linux - Released: Aug 3, 2026 - Priority: High (Closes CVE-2026-50252, high severity) - CVEs: 13, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-2033.html ## Applies to | Product | Release | Fixed in | |---|---|---| | [python3-unbound](https://patchblox.com/security/data/product/linux/python3-unbound.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [python3-unbound-debuginfo](https://patchblox.com/security/data/product/linux/python3-unbound-debuginfo.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound](https://patchblox.com/security/data/product/linux/unbound.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-anchor](https://patchblox.com/security/data/product/linux/unbound-anchor.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-anchor-debuginfo](https://patchblox.com/security/data/product/linux/unbound-anchor-debuginfo.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-debuginfo](https://patchblox.com/security/data/product/linux/unbound-debuginfo.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-debugsource](https://patchblox.com/security/data/product/linux/unbound-debugsource.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-devel](https://patchblox.com/security/data/product/linux/unbound-devel.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-libs](https://patchblox.com/security/data/product/linux/unbound-libs.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-libs-debuginfo](https://patchblox.com/security/data/product/linux/unbound-libs-debuginfo.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-utils](https://patchblox.com/security/data/product/linux/unbound-utils.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | | [unbound-utils-debuginfo](https://patchblox.com/security/data/product/linux/unbound-utils-debuginfo.md) | amzn 2023 | 1.17.1-1.amzn2023.0.13 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-50252](https://patchblox.com/security/data/cve/CVE-2026-50252.md) | High | Possible cache poisoning attack by mapping source port population per thread | 9.3 | 0.0017 | | | [CVE-2026-44690](https://patchblox.com/security/data/cve/CVE-2026-44690.md) | High | Cross-zone wildcard cache poisoning via RRSIG.labels manipulation | 8.6 | 0.0015 | | | [CVE-2026-50251](https://patchblox.com/security/data/cve/CVE-2026-50251.md) | Routine | Attacker supplied '0.0.0.0'/'::' glue triggers defensive full-cache flush | 5.3 | 0.0025 | | | [CVE-2026-44621](https://patchblox.com/security/data/cve/CVE-2026-44621.md) | Routine | Libunbound applications configured with 'unwanted-reply-threshold' could eventually be abruptly terminated | 5.9 | 0.0025 | | | [CVE-2026-50046](https://patchblox.com/security/data/cve/CVE-2026-50046.md) | Routine | Possible heap use-after-free in an error path when a DoT forwarded query is jostled out | 5.9 | 0.0024 | | | [CVE-2026-55717](https://patchblox.com/security/data/cve/CVE-2026-55717.md) | Routine | 'serve-expired-client-timeout' and 'response-ip' CNAME redirect could lead to a crash | 5.9 | 0.0024 | | | [CVE-2026-44687](https://patchblox.com/security/data/cve/CVE-2026-44687.md) | Routine | Off-by-one error in 'harden-below-nxdomain' logic can shadow a stub/forward zone by a legitimate parent's NXDOMAIN | 3.7 | 0.0022 | | | [CVE-2026-42955](https://patchblox.com/security/data/cve/CVE-2026-42955.md) | Routine | Extra fix for CVE-2026-40622 to also clamp the TTL of A/AAAA records disallowing a one-time 'ghost domain' delegation renewal via glue records | 3.7 | 0.0020 | | | [CVE-2026-46582](https://patchblox.com/security/data/cve/CVE-2026-46582.md) | Routine | A wildcard replay, as another piece of data, triggers poisoning in the serve expired reply path | 3.7 | 0.0019 | | | [CVE-2026-55708](https://patchblox.com/security/data/cve/CVE-2026-55708.md) | Routine | Privacy/configuration issue when adding local data in views through 'unbound-control' | 3.1 | 0.0016 | | | [CVE-2026-50248](https://patchblox.com/security/data/cve/CVE-2026-50248.md) | Routine | BOGUS configured primary hostname accepted for XFR in auth/rpz zones | 6.5 | 0.0013 | | | [CVE-2026-56416](https://patchblox.com/security/data/cve/CVE-2026-56416.md) | Routine | Possible heap buffer overflow when validator canonicalizes RDATA that contains domain name | 4.8 | 0.0012 | | | [CVE-2026-50243](https://patchblox.com/security/data/cve/CVE-2026-50243.md) | Routine | 'response-ip'/'rpz' can rewrite BOGUS answers instead of returning SERVFAIL | 3.7 | 0.0011 | | --- Data as of 2026-11-10T13:56:55Z UTC. 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