Description
A flaw was found in Rustls 0.23.13 and related APIs. This vulnerability allows denial of service (panic) via a fragmented TLS ClientHello message.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | rustls | 0.23.13 – < 0.23.18 | 0.23.18 |
| Red Hat | Red Hat Trusted Artifact Signer | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rust-rustls | No fix yet | — |
| Ubuntu 26.04 LTS | rust-rustls | No fix yet | — |
| Ubuntu 25.10 | rust-rustls | No fix yet | — |
| Ubuntu 24.04 LTS | rust-rustls | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | himmelblau | 2.3.9+git0.a9fd29b-150700.3.15.1 | SUSE-SU-2026:1361-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | himmelblau | 0.7.7+git.0.b48d0bb-1.1 | openSUSE-SU-2024:14539-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | rust | 1.86.0-6 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | rustls | >= 0.23.13, < 0.23.18 | 0.23.18 | GHSA-qg5g-gv98-5ffh |
| crates.io | rustls | >= 0.23.0, < 0.23.0 · >= 0.23.13, < 0.23.18 | 0.23.0, 0.23.18 | RUSTSEC-2024-0399 |
Advisories 3
- SUSE-SU-2026:1361-1 Security update for himmelblau SUSE / openSUSE Security Updates · Apr 16, 2026
- openSUSE-SU-2024:14539-1 himmelblau-0.7.7+git.0.b48d0bb-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0686 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 2, 2025