# ALSA-2026:27738: Security update for 2 packages

ALSA-2026:27738, released June 22, 2026, fixes 4 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2026-27738
- Platform: Linux
- Released: Jun 22, 2026
- Priority: High (Closes CVE-2026-6473, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2026:27738

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libpq](https://patchblox.com/security/data/product/linux/libpq.md) | almalinux 8 | 13.23-2.el8_10 |
| [libpq-devel](https://patchblox.com/security/data/product/linux/libpq-devel.md) | almalinux 8 | 13.23-2.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-6473](https://patchblox.com/security/data/cve/CVE-2026-6473.md) | High | PostgreSQL server undersizes allocations, via integer wraparound | 8.8 | 0.0101 |  |
| [CVE-2026-6478](https://patchblox.com/security/data/cve/CVE-2026-6478.md) | High | PostgreSQL discloses MD5-hashed passwords via covert timing channel | 8.8 | 0.0056 |  |
| [CVE-2026-6477](https://patchblox.com/security/data/cve/CVE-2026-6477.md) | High | PostgreSQL libpq lo_* functions let server superuser overwrite client stack memory | 8.8 | 0.0045 |  |
| [CVE-2026-6475](https://patchblox.com/security/data/cve/CVE-2026-6475.md) | High | PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice | 8.8 | 0.0041 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo