# RHSA-2021:0538: Security update for 10 packages

RHSA-2021:0538, released February 16, 2021, fixes 4 CVEs across 10 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-0538
- Platform: Linux
- Released: Feb 16, 2021
- Priority: High (Closes CVE-2020-12403, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:0538

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [nss](https://patchblox.com/security/data/product/linux/nss.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-devel](https://patchblox.com/security/data/product/linux/nss-devel.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-softokn](https://patchblox.com/security/data/product/linux/nss-softokn.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-softokn-devel](https://patchblox.com/security/data/product/linux/nss-softokn-devel.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-softokn-freebl](https://patchblox.com/security/data/product/linux/nss-softokn-freebl.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-softokn-freebl-devel](https://patchblox.com/security/data/product/linux/nss-softokn-freebl-devel.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-sysinit](https://patchblox.com/security/data/product/linux/nss-sysinit.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-tools](https://patchblox.com/security/data/product/linux/nss-tools.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-util](https://patchblox.com/security/data/product/linux/nss-util.md) | RHEL 8 | 0:3.53.1-17.el8_3 |
| [nss-util-devel](https://patchblox.com/security/data/product/linux/nss-util-devel.md) | RHEL 8 | 0:3.53.1-17.el8_3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-12403](https://patchblox.com/security/data/cve/CVE-2020-12403.md) | High | nss: Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-... | 9.1 | 0.0154 |  |
| [CVE-2020-6829](https://patchblox.com/security/data/cve/CVE-2020-6829.md) | Routine | Firefox ESR and 1 other: When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which… | 5.3 | 0.0148 |  |
| [CVE-2020-12401](https://patchblox.com/security/data/cve/CVE-2020-12401.md) | Routine | Firefox ESR and 1 other: During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar… | 4.7 | 0.0033 |  |
| [CVE-2020-12400](https://patchblox.com/security/data/cve/CVE-2020-12400.md) | Routine | Firefox ESR and 1 other: When converting coordinates from projective to affine, the modular inversion was not performed in constant… | 4.7 | 0.0027 |  |

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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

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