CVE-2026-35469: SpdyStream: DOS on CRI
Noroxi assessment
Priority: Monitor (action score 34/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.65% (FIRST EPSS); higher than 51.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: moby spdystream 0.5.1; azl3 cert-manager 1.12.15-6 on Azure Linux 3.0 1.12.15-7; azl3 containerd2 0.0.0-1 on Azure Linux 3.0 2.0.0-19.
Low priority for now. Upgrade to moby spdystream 0.5.1; azl3 cert-manager 1.12.15-6 on Azure Linux 3.0 1.12.15-7; azl3 containerd2 0.0.0-1 on Azure Linux 3.0 2.0.0-19 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- GHSA-pc3f-x583-g7j2
- GO-2026-4958
- openSUSE-SU-2026:11107-1
- openSUSE-SU-2026:11305-1
- openSUSE-SU-2026:11307-1
- openSUSE-SU-2026:11514-1
- openSUSE-SU-2026:21213-1
- openSUSE-SU-2026:21590-1
- openSUSE-SU-2026:21824-1
- RHSA-2026:34755
- RHSA-2026:36796
- RHSA-2026:41019
- RHSA-2026:51422
- SUSE-SU-2026:22800-1
- SUSE-SU-2026:22892-1
- SUSE-SU-2026:2315-1
- SUSE-SU-2026:2322-1
- SUSE-SU-2026:2325-1
- SUSE-SU-2026:2339-1
- SUSE-SU-2026:2340-1
- Published
- Apr 16, 2026
- Updated
- Oct 26, 2026
- EPSS
- 0.6% · 51th percentile
- CWE
- CWE-770
Report tools
Action score
34
Low priority for now.
- CVSS
- 34 / 40 · 8.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 8.7
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| openshift | 4.19 | cpe:2.3:redhat:openshift:4.19 |
| edge manager | 1.0 | cpe:2.3:redhat:edge_manager:1.0 |
| edge manager | 1.1 | cpe:2.3:redhat:edge_manager:1.1 |
| cluster observability operator | 1.5 | cpe:2.3:redhat:cluster_observability_operator:1.5 |
| logging | 6.6 | cpe:2.3:redhat:logging:6.6 |
| multicluster engine | 2.10 | cpe:2.3:redhat:multicluster_engine:2.10 |
| multicluster engine | 2.11 | cpe:2.3:redhat:multicluster_engine:2.11 |
| multicluster engine | 2.8 | cpe:2.3:redhat:multicluster_engine:2.8 |
| acm | 2.13 | cpe:2.3:redhat:acm:2.13 |
| advanced cluster security | 4.8 | cpe:2.3:redhat:advanced_cluster_security:4.8 |
| advanced cluster security | 4.9 | cpe:2.3:redhat:advanced_cluster_security:4.9 |
| advanced cluster security | 4.10 | cpe:2.3:redhat:advanced_cluster_security:4.10 |
and 33 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
moby spdystream
- < 0.5.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.24 | containerd | before 2.2.3-r0 | 2.2.3-r0 |
| Debian:12 | golang-github-docker-spdystream | from 0 | — |
| Go | github.com/moby/spdystream | before 0.5.1 | 0.5.1 |
| openSUSE:Leap 16.0 | containerd | before 1.7.33-160000.1.1 | 1.7.33-160000.1.1 |
| openSUSE:Leap 16.0 | containerized-data-importer1.65 | before 1.65.0-160000.3.1 | 1.65.0-160000.3.1 |
| openSUSE:Leap 16.0 | kubevirt1.8 | before 1.8.4-160000.1.1 | 1.8.4-160000.1.1 |
| openSUSE:Tumbleweed | containerd | before 1.7.33-1.1 | 1.7.33-1.1 |
| openSUSE:Tumbleweed | containerized-data-importer1.65 | before 1.65.0-2.1 | 1.65.0-2.1 |
| openSUSE:Tumbleweed | containerized-data-importer1.66 | before 1.66.0-1.1 | 1.66.0-1.1 |
| openSUSE:Tumbleweed | kubevirt1.8 | before 1.8.4-1.1 | 1.8.4-1.1 |
| Red Hat:edge_manager:1.0::el9 | flightctl | before 0:1.0.3-1.el9em | 0:1.0.3-1.el9em |
| Red Hat:edge_manager:1.0::el9 | flightctl-agent | before 0:1.0.3-1.el9em | 0:1.0.3-1.el9em |
| Red Hat:edge_manager:1.0::el9 | flightctl-cli | before 0:1.0.3-1.el9em | 0:1.0.3-1.el9em |
| Red Hat:edge_manager:1.0::el9 | flightctl-selinux | before 0:1.0.3-1.el9em | 0:1.0.3-1.el9em |
| Red Hat:edge_manager:1.1::el10 | flightctl | before 0:1.1.3-1.el10em | 0:1.1.3-1.el10em |
| Red Hat:edge_manager:1.1::el10 | flightctl-agent | before 0:1.1.3-1.el10em | 0:1.1.3-1.el10em |
| Red Hat:edge_manager:1.1::el10 | flightctl-cli | before 0:1.1.3-1.el10em | 0:1.1.3-1.el10em |
| Red Hat:edge_manager:1.1::el9 | flightctl | before 0:1.1.3-1.el9em | 0:1.1.3-1.el9em |
| Red Hat:edge_manager:1.1::el9 | flightctl-agent | before 0:1.1.3-1.el9em | 0:1.1.3-1.el9em |
| Red Hat:edge_manager:1.1::el9 | flightctl-cli | before 0:1.1.3-1.el9em | 0:1.1.3-1.el9em |
| Red Hat:openshift:4.19::el9 | microshift | before 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 |
| Red Hat:openshift:4.19::el9 | microshift-ai-model-serving | before 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 |
| Red Hat:openshift:4.19::el9 | microshift-ai-model-serving-release-info | before 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 |
| Red Hat:openshift:4.19::el9 | microshift-gateway-api | before 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 |
+36
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| moby spdystream | 0.5.1 · description | Vendor (CNA) |
| azl3 cert-manager 1.12.15-6 on Azure Linux 3.0 | 1.12.15-7 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 containerd2 0.0.0-1 on Azure Linux 3.0 | 2.0.0-19 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 containerized-data-importer 1.62.0-3 on Azure Linux 3.0 | 1.62.0-4 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 cri-tools 1.32.0-4 on Azure Linux 3.0 | 1.32.0-5 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0 | 0.14.0-12 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 docker-compose 2.27.0-9 on Azure Linux 3.0 | 2.27.0-10 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 keda 2.14.1-11 on Azure Linux 3.0 | 2.14.1-12 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 kubernetes 1.30.10-23 on Azure Linux 3.0 | 1.30.10-23 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 kubevirt 1.7.1-2 on Azure Linux 3.0 | 1.7.1-3 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 kured 1.15.0-3 on Azure Linux 3.0 | 1.15.0-4 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 moby-containerd-cc 1.7.7-11 on Azure Linux 3.0 | 1.7.7-12 · CBL-Mariner Releases | Microsoft (MSRC) |
| alpine:containerd | 2.2.3-r0 · Alpine:v3.24 | Package registry (OSV) |
| Go:github.com/moby/spdystream | 0.5.1 | Package registry (OSV) |
| opensuse:containerd | 1.7.33-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:containerized-data-importer1.65 | 1.65.0-2.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:containerized-data-importer1.66 | 1.66.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:kubevirt1.8 | 1.8.4-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:flightctl | 0:1.0.3-1.el9em · Red Hat:edge_manager:1.0::el9 | Package registry (OSV) |
| red hat:flightctl-agent | 0:1.0.3-1.el9em · Red Hat:edge_manager:1.0::el9 | Package registry (OSV) |
| red hat:flightctl-cli | 0:1.0.3-1.el9em · Red Hat:edge_manager:1.0::el9 | Package registry (OSV) |
| red hat:flightctl-selinux | 0:1.0.3-1.el9em · Red Hat:edge_manager:1.0::el9 | Package registry (OSV) |
| red hat:microshift | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:microshift-ai-model-serving | 0:4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift-hyperkube | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift-kube-apiserver | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift-kube-controller-manager | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift-kube-scheduler | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
| red hat:openshift-kubelet | 0:4.19.0-202606301915.p2.g63adf01.assembly.stream.el9 · Red Hat:openshift:4.19::el9 | Package registry (OSV) |
+11
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-770 · Allocation of Resources Without Limits or ThrottlingCVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- FloodingCAPEC-125likelihood: High · Medium
- Excessive AllocationCAPEC-130likelihood: Medium · Medium
- XML Ping of the DeathCAPEC-147likelihood: Low · Medium
- Exponential Data ExpansionCAPEC-197likelihood: High · Medium
- Serialized Data Parameter BlowupCAPEC-229likelihood: High · High
- Serialized Data with Nested PayloadsCAPEC-230likelihood: Medium · High
- Oversized Serialized Data PayloadsCAPEC-231likelihood: Medium · High
- HTTP DoSCAPEC-469Low
ATT&CK techniques
- Network Denial of Service:Direct Network FloodT1498.001
- Network Denial of Service:Reflection AmplificationT1498.002
- Endpoint Denial of ServiceT1499
- Endpoint Denial of Service: OS Exhaustion FloodT1499.001
- Endpoint Denial of Service:Service Exhaustion FloodT1499.002
- Endpoint Denial of Service:Application Exhaustion FloodT1499.003
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- github.com/moby/spdystream/security/advisories/GHSA-pc3f-x583-g7j2
- access.redhat.com/errata/RHSA-2026:11070
- access.redhat.com/errata/RHSA-2026:11217
- access.redhat.com/errata/RHSA-2026:12118
- access.redhat.com/errata/RHSA-2026:13791
- access.redhat.com/errata/RHSA-2026:13829
- access.redhat.com/errata/RHSA-2026:17121
- access.redhat.com/errata/RHSA-2026:17123
- access.redhat.com/errata/RHSA-2026:17449
- access.redhat.com/errata/RHSA-2026:17468
- access.redhat.com/errata/RHSA-2026:17469
- access.redhat.com/errata/RHSA-2026:17475
- access.redhat.com/errata/RHSA-2026:17598
- access.redhat.com/errata/RHSA-2026:17599
- access.redhat.com/errata/RHSA-2026:17704
- access.redhat.com/errata/RHSA-2026:19099
- access.redhat.com/errata/RHSA-2026:19108
- access.redhat.com/errata/RHSA-2026:20034
- access.redhat.com/errata/RHSA-2026:20041
Vendor advisories and official records. Exploit/PoC links are deliberately left out.