# ALSA-2021:4326: Security update for 4 packages

ALSA-2021:4326, released November 9, 2021, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2021-4326
- Platform: Linux
- Released: Nov 9, 2021
- Priority: High (Closes CVE-2021-31535, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2021:4326

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libX11](https://patchblox.com/security/data/product/linux/libx11-libx11.md) | almalinux 8 | 1.6.8-5.el8 |
| [libX11-common](https://patchblox.com/security/data/product/linux/libx11-common.md) | almalinux 8 | 1.6.8-5.el8 |
| [libX11-devel](https://patchblox.com/security/data/product/linux/libx11-devel.md) | almalinux 8 | 1.6.8-5.el8 |
| [libX11-xcb](https://patchblox.com/security/data/product/linux/libx11-xcb.md) | almalinux 8 | 1.6.8-5.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-31535](https://patchblox.com/security/data/cve/CVE-2021-31535.md) | High | libX11-common: The libX11 packages contain the core X11 protocol client library.  Security Fix(es):  * libX11: missing request lengt... | 9.8 | 0.1035 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo