# ALSA-2024:2551: Security update for 11 packages

ALSA-2024:2551, released April 30, 2024, fixes 6 CVEs across 11 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2024-2551
- Platform: Linux
- Released: Apr 30, 2024
- Priority: High (Closes CVE-2023-50387, high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2024:2551

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bind](https://patchblox.com/security/data/product/linux/bind.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-chroot](https://patchblox.com/security/data/product/linux/bind-chroot.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-devel](https://patchblox.com/security/data/product/linux/bind-devel.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-dnssec-doc](https://patchblox.com/security/data/product/linux/bind-dnssec-doc.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-dnssec-utils](https://patchblox.com/security/data/product/linux/bind-dnssec-utils.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-doc](https://patchblox.com/security/data/product/linux/bind-doc.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-dyndb-ldap](https://patchblox.com/security/data/product/linux/bind-dyndb-ldap.md) | almalinux 9 | 11.9-9.el9_4.alma.1 |
| [bind-libs](https://patchblox.com/security/data/product/linux/bind-libs.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-license](https://patchblox.com/security/data/product/linux/bind-license.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [bind-utils](https://patchblox.com/security/data/product/linux/bind-utils.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |
| [python3-bind](https://patchblox.com/security/data/product/linux/python3-bind.md) | almalinux 9 | 32:9.16.23-18.el9_4.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-50387](https://patchblox.com/security/data/cve/CVE-2023-50387.md) | High | MITRE: CVE-2023-50387 DNSSEC verification complexity can be exploited to exhaust CPU resources and stall DNS resolvers | 7.5 | 0.9999 |  |
| [CVE-2023-50868](https://patchblox.com/security/data/cve/CVE-2023-50868.md) | High | MITRE: CVE-2023-50868 NSEC3 closest encloser proof can exhaust CPU | 7.5 | 0.7430 | Disclosed |
| [CVE-2023-4408](https://patchblox.com/security/data/cve/CVE-2023-4408.md) | High | bind: This update for bind fixes the following issues:   - CVE-2023-4408: Fixed denial of service during DNS message parsin... | 7.5 | 0.0139 |  |
| [CVE-2023-5517](https://patchblox.com/security/data/cve/CVE-2023-5517.md) | High | bind9: A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when:   - `nxdomain-red... | 7.5 | 0.0128 |  |
| [CVE-2023-5679](https://patchblox.com/security/data/cve/CVE-2023-5679.md) | High | bind9: A bad interaction between DNS64 and serve-stale may cause `named` to crashwith an assertion failure during recursive... | 7.5 | 0.0128 |  |
| [CVE-2023-6516](https://patchblox.com/security/data/cve/CVE-2023-6516.md) | High | bind: This update for bind fixes the following issues:   - CVE-2023-4408: Fixed denial of service during DNS message parsin... | 7.5 | 0.0110 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo