# CVE-2026-35469: SpdyStream: DOS on CRI

CVE-2026-35469 is fixed in 13 products on 1 platform, first by RHSA-2026:41019, released May 22, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-35469
- Priority: High
- CVSS: 8.1 (Important)
- EPSS: 0.0066
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 13, 2026
- Weakness: Allocation of Resources Without Limits or Throttling
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35469

## Description

spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser does not validate attacker-controlled counts and lengths before allocating memory. Three allocation paths are affected: the SETTINGS frame entry count, the header count in parseHeaderValueBlock, and individual header field sizes — all read as 32-bit integers and used directly as allocation sizes with no bounds checking. Because SPDY header blocks are zlib-compressed, a small on-the-wire payload can decompress into large attacker-controlled values. A remote peer that can send SPDY frames to a service using spdystream can exhaust process memory and cause an out-of-memory crash with a single crafted control frame. This issue has been fixed in version 0.5.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | containerd opensuse-leap 16.0 | 1.7.33-160000.1.1 | [OPENSUSE-SU-2026:21213-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21213-1.md) | Jul 2, 2026 |
| Linux | containerd sles 15.7 | 1.7.29-150000.142.1 | [SUSE-SU-2026:3450-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3450-1.md) | Aug 3, 2026 |
| Linux | containerized-data-importer1.65 opensuse-leap 16.0 | 1.65.0-160000.3.1 | [OPENSUSE-SU-2026:21824-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21824-1.md) | Sep 9, 2026 |
| Linux | flightctl RHEL 10 | 1.1.3-1.el10em | [RHSA-2026:41019](https://patchblox.com/security/data/fix/linux/rhsa-2026-41019.md) | May 22, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |
| Linux | kubernetes sles 15.7 | 1.35.4-150600.13.34.1 | [SUSE-SU-2026:2342-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2342-1.md) | Jun 10, 2026 |
| Linux | kubernetes-old sles 15.7 | 1.33.11-150600.13.32.1 | [SUSE-SU-2026:2460-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2460-1.md) | Jun 18, 2026 |
| Linux | kubernetes1.33 Fedora 43 | 1.33.13-1.fc43 | [FEDORA-2026-C2A89CCCA5](https://patchblox.com/security/data/fix/linux/fedora-2026-c2a89ccca5.md) | Jun 12, 2026 |
| Linux | kubernetes1.33-client Fedora 43 | 1.33.13-1.fc43 | [FEDORA-2026-C2A89CCCA5](https://patchblox.com/security/data/fix/linux/fedora-2026-c2a89ccca5.md) | Jun 12, 2026 |
| Linux | kubernetes1.33-kubeadm Fedora 43 | 1.33.13-1.fc43 | [FEDORA-2026-C2A89CCCA5](https://patchblox.com/security/data/fix/linux/fedora-2026-c2a89ccca5.md) | Jun 12, 2026 |
| Linux | kubernetes1.33-systemd Fedora 43 | 1.33.13-1.fc43 | [FEDORA-2026-C2A89CCCA5](https://patchblox.com/security/data/fix/linux/fedora-2026-c2a89ccca5.md) | Jun 12, 2026 |
| Linux | kubevirt sles 15.7 | 1.7.4-150700.3.30.1 | [SUSE-SU-2026:3203-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3203-1.md) | Jul 23, 2026 |
| Linux | kubevirt-1.6 sles 15.7 | 1.6.6-150700.15.17.1 | [SUSE-SU-2026:3630-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3630-1.md) | Aug 17, 2026 |
| Linux | kubevirt1.8 opensuse-leap 16.0 | 1.8.4-160000.1.1 | [OPENSUSE-SU-2026:21590-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21590-1.md) | Aug 18, 2026 |

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Data as of 2026-11-09T07:25:28Z 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

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