# CVE-2026-8933: golang-github-snapcore-snapd-dev: A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally...

CVE-2026-8933 is fixed in 9 products on 1 platform, first by golang-github-snapcore-snapd-dev 2.76+ubuntu26.04.3, released July 21, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-8933
- Priority: High
- CVSS: 7.8 (High)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 21, 2026

## Description

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | golang-github-snapcore-snapd-dev Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [golang-github-snapcore-snapd-dev 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-golang-github-snapcore-snapd-dev-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | golang-github-snapcore-snapd-dev Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [golang-github-snapcore-snapd-dev 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-golang-github-snapcore-snapd-dev-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | golang-github-snapcore-snapd-dev Ubuntu 26.04.1 LTS (resolute) | 2.76+ubuntu26.04.3 | [golang-github-snapcore-snapd-dev 2.76+ubuntu26.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-golang-github-snapcore-snapd-dev-2.76-ubuntu26.04.3.md) | Jul 21, 2026 |
| Linux | golang-github-ubuntu-core-snappy-dev Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [golang-github-ubuntu-core-snappy-dev 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-golang-github-ubuntu-core-snappy-dev-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | golang-github-ubuntu-core-snappy-dev Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [golang-github-ubuntu-core-snappy-dev 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-golang-github-ubuntu-core-snappy-dev-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | snap-confine Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [snap-confine 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-snap-confine-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | snap-confine Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [snap-confine 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-snap-confine-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | snapd Debian 14 | 2.76.3-1 | [DEBIAN-CVE-2026-8933](https://patchblox.com/security/data/fix/linux/debian-cve-2026-8933.md) | Jul 21, 2026 |
| Linux | snapd Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [snapd 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-snapd-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | snapd Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [snapd 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-snapd-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | snapd Ubuntu 26.04.1 LTS (resolute) | 2.76+ubuntu26.04.3 | [snapd 2.76+ubuntu26.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-snapd-2.76-ubuntu26.04.3.md) | Jul 21, 2026 |
| Linux | snapd-xdg-open Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [snapd-xdg-open 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-snapd-xdg-open-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | snapd-xdg-open Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [snapd-xdg-open 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-snapd-xdg-open-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-core-launcher Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [ubuntu-core-launcher 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-core-launcher-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-core-launcher Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [ubuntu-core-launcher 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-core-launcher-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-core-snapd-units Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [ubuntu-core-snapd-units 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-core-snapd-units-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-core-snapd-units Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [ubuntu-core-snapd-units 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-core-snapd-units-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-snappy Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [ubuntu-snappy 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-snappy-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-snappy Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [ubuntu-snappy 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-snappy-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-snappy-cli Ubuntu 22.04.1 LTS (jammy) | 2.76+ubuntu22.04.1 | [ubuntu-snappy-cli 2.76+ubuntu22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-snappy-cli-2.76-ubuntu22.04.1.md) | Jul 23, 2026 |
| Linux | ubuntu-snappy-cli Ubuntu 24.04.5 LTS (noble) | 2.76+ubuntu24.04.1 | [ubuntu-snappy-cli 2.76+ubuntu24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-snappy-cli-2.76-ubuntu24.04.1.md) | Jul 23, 2026 |

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