# ELSA-2022-5099: Security update for 13 packages

ELSA-2022-5099, released June 30, 2022, fixes 8 CVEs across 13 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2022-5099
- Platform: Linux
- Released: Jun 30, 2022
- Priority: High (Closes CVE-2022-28733, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2022-5099.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [grub2-common](https://patchblox.com/security/data/product/linux/grub2-common.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-aa64](https://patchblox.com/security/data/product/linux/grub2-efi-aa64.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-aa64-cdboot](https://patchblox.com/security/data/product/linux/grub2-efi-aa64-cdboot.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-aa64-modules](https://patchblox.com/security/data/product/linux/grub2-efi-aa64-modules.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-x64](https://patchblox.com/security/data/product/linux/grub2-efi-x64.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-x64-cdboot](https://patchblox.com/security/data/product/linux/grub2-efi-x64-cdboot.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-efi-x64-modules](https://patchblox.com/security/data/product/linux/grub2-efi-x64-modules.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-pc](https://patchblox.com/security/data/product/linux/grub2-pc.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-pc-modules](https://patchblox.com/security/data/product/linux/grub2-pc-modules.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-tools](https://patchblox.com/security/data/product/linux/grub2-tools.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-tools-efi](https://patchblox.com/security/data/product/linux/grub2-tools-efi.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-tools-extra](https://patchblox.com/security/data/product/linux/grub2-tools-extra.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |
| [grub2-tools-minimal](https://patchblox.com/security/data/product/linux/grub2-tools-minimal.md) | ol 9 | 1:2.06-27.0.6.el9_0.7 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-28733](https://patchblox.com/security/data/cve/CVE-2022-28733.md) | High | grub-efi-amd64: Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in gru... | 8.1 | 0.0127 |  |
| [CVE-2022-28734](https://patchblox.com/security/data/cve/CVE-2022-28734.md) | High | grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable... | 8.1 | 0.0112 |  |
| [CVE-2021-3696](https://patchblox.com/security/data/cve/CVE-2021-3696.md) | High | grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable... | 8.1 | 0.0048 |  |
| [CVE-2021-3695](https://patchblox.com/security/data/cve/CVE-2021-3695.md) | High | grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable... | 8.1 | 0.0048 |  |
| [CVE-2021-3697](https://patchblox.com/security/data/cve/CVE-2021-3697.md) | High | grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable... | 8.1 | 0.0047 |  |
| [CVE-2022-28737](https://patchblox.com/security/data/cve/CVE-2022-28737.md) | High | shim: There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle... | 8.1 | 0.0033 |  |
| [CVE-2022-28735](https://patchblox.com/security/data/cve/CVE-2022-28735.md) | High | grub-efi-arm64: The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems | 8.1 | 0.0031 |  |
| [CVE-2022-28736](https://patchblox.com/security/data/cve/CVE-2022-28736.md) | High | grub-efi-arm64: There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up... | 8.1 | 0.0029 |  |

---

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