CVE-2023-26964
published 2023-04-11CVE-2023-26964: 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…
PriorityP434high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.12%
62.1th percentile
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
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | rust-h2 | < rust-h2 0.3.13-2 (bookworm) | rust-h2 0.3.13-2 (bookworm) |
| h2database | h2 | >= 0 < 0.3.17 | 0.3.17 |
| h2database | h2 | >= 0.0.0-0 < 0.3.17 | 0.3.17 |
| hyper | h2 | — | — |
| hyper | hyper | — | — |
| msrc | azl3_kata-containers_3.1.3-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_kata-containers_3.2.0.azl0-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_mozjs_102.15.1-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_rpm-ostree_2022.1-7_on_azure_linux_3.0 | — | — |
| msrc | azl3_rpm-ostree_2024.4-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_rust_1.86.0-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_rust_h2-0.3.26_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_kata-containers_3.2.0.azl0-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_rpm-ostree_2022.1-7_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
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Microsoft
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 Den
vendor_msrc·2023-04-11·CVSS 7.5
CVE-2023-26964 [HIGH] CWE-770 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 Den
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).
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identifie
Debian
CVE-2023-26964: rust-h2 - An issue was discovered in hyper v0.13.7. h2-0.2.4 Stream stacking occurs when t...
vendor_debian·2023·CVSS 7.5
CVE-2023-26964 [HIGH] CVE-2023-26964: rust-h2 - An issue was discovered in hyper v0.13.7. h2-0.2.4 Stream stacking occurs when t...
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).
Scope: local
bookworm: resolved (fixed in 0.3.13-2)
forky: resolved (fixed in 0.3.13-2)
sid: resolved (fixed in 0.3.13-2)
trixie: resolved (fixed in 0.3.13-2)
OSV
Resource exhaustion vulnerability in h2 may lead to Denial of Service (DoS)
osv·2023-04-14
CVE-2023-26964 Resource exhaustion vulnerability in h2 may lead to Denial of Service (DoS)
Resource exhaustion vulnerability in h2 may lead to Denial of Service (DoS)
If an attacker is able to flood the network with pairs of `HEADERS`/`RST_STREAM` frames, such that the `h2` application is not able to accept them faster than the bytes are received, the pending accept queue can grow in memory usage. Being able to do this consistently can result in excessive memory use, and eventually trigger Out Of Memory.
This flaw is corrected in [hyperium/h2#668](https://github.com/hyperium/h2/pull/668), which restricts remote reset stream count by default.
OSV
h2 vulnerable to denial of service
osv·2023-04-11
CVE-2023-26964 [MEDIUM] h2 vulnerable to denial of service
h2 vulnerable to denial of service
Hyper is an HTTP library for Rust and h2 is an HTTP 2.0 client & server implementation for Rust. An issue was discovered in h2 v0.2.4 when processing header frames. It incorrectly processes the HTTP2 `RST_STREAM` frames by not always releasing the memory immediately upon receiving the reset frame, leading to stream stacking. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).
This issue affects users only when dealing with http2 connections.
OSV
CVE-2023-26964: An issue was discovered in hyper v0
osv·2023-04-11·CVSS 7.5
CVE-2023-26964 [HIGH] CVE-2023-26964: An issue was discovered in hyper v0
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).
GHSA
h2 vulnerable to denial of service
ghsa·2023-04-11
CVE-2023-26964 [MEDIUM] CWE-770 h2 vulnerable to denial of service
h2 vulnerable to denial of service
Hyper is an HTTP library for Rust and h2 is an HTTP 2.0 client & server implementation for Rust. An issue was discovered in h2 v0.2.4 when processing header frames. It incorrectly processes the HTTP2 `RST_STREAM` frames by not always releasing the memory immediately upon receiving the reset frame, leading to stream stacking. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).
This issue affects users only when dealing with http2 connections.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/hyperium/hyper/issues/2877https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBAE7LQARMPUEEV4TWET4D7G6WCWBUD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYRZ5Y2ALATKKPIITAFAJIS4TR4LUAHO/https://github.com/hyperium/hyper/issues/2877https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBAE7LQARMPUEEV4TWET4D7G6WCWBUD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYRZ5Y2ALATKKPIITAFAJIS4TR4LUAHO/
2023-04-11
Published