# ALSA-2021:4358: Security update for 6 packages

ALSA-2021:4358, released November 9, 2021, fixes 3 CVEs across 6 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2021-4358
- Platform: Linux
- Released: Nov 9, 2021
- Priority: High (Closes CVE-2021-33574, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2021:4358

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [compat-libpthread-nonshared](https://patchblox.com/security/data/product/linux/compat-libpthread-nonshared.md) | almalinux 8 | 2.28-164.el8 |
| [glibc-benchtests](https://patchblox.com/security/data/product/linux/glibc-benchtests.md) | almalinux 8 | 2.28-164.el8 |
| [glibc-nss-devel](https://patchblox.com/security/data/product/linux/glibc-nss-devel.md) | almalinux 8 | 2.28-164.el8 |
| [glibc-static](https://patchblox.com/security/data/product/linux/glibc-static.md) | almalinux 8 | 2.28-164.el8 |
| [glibc-utils](https://patchblox.com/security/data/product/linux/glibc-utils.md) | almalinux 8 | 2.28-164.el8 |
| [nss_hesiod](https://patchblox.com/security/data/product/linux/nss-hesiod.md) | almalinux 8 | 2.28-164.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-33574](https://patchblox.com/security/data/cve/CVE-2021-33574.md) | High | compat-libpthread-nonshared: The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math librar... | 9.8 | 0.0352 |  |
| [CVE-2021-35942](https://patchblox.com/security/data/cve/CVE-2021-35942.md) | High | glibc-langpack-ru: The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math librar... | 9.1 | 0.0275 |  |
| [CVE-2021-27645](https://patchblox.com/security/data/cve/CVE-2021-27645.md) | High | glibc-langpack-sr: The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math librar... | 9.1 | 0.0039 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo