Vulnerability · Published Apr 11, 2023 · Assigned by mitre
CVE-2023-26964
High 7.5
In plain English
A high-severity resource allocation without limits in the rust-h2 package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.1%top 33.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An issue was discovered in hyper v0.13.7. h2-0.2.4 Stream stacking occurs when the H2 component processes HTTP2 RST_STREAM frames. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-h2 | 0.3.13-2 | DEBIAN-CVE-2023-26964 |
| Debian:13 | rust-h2 | 0.3.13-2 | DEBIAN-CVE-2023-26964 |
| Debian:14 | rust-h2 | 0.3.13-2 | DEBIAN-CVE-2023-26964 |
| Ubuntu:24.04:LTS | rust-hyper | no fix listed | UBUNTU-CVE-2023-26964 |
| Ubuntu:25.10 | rust-hyper | no fix listed | UBUNTU-CVE-2023-26964 |
| Ubuntu:26.04:LTS | rust-hyper | no fix listed | UBUNTU-CVE-2023-26964 |
| Ubuntu:26.10 | rust-hyper | no fix listed | UBUNTU-CVE-2023-26964 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/hyperium/hyper/issues/2877
- FEDORA-2023-cc21019773 vendor-advisory
- FEDORA-2023-37ae269843 vendor-advisory