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Fencer Intel
high 7.5

CVE-2025-65637 json

Logrus is vulnerable to DoS when using Entry.Writer()

published 11mo ago modified 5d ago also GHSA-4f99-4q7p-p3gh , GO-2025-4188 , EUVD-2025-201258

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.

Patch / fix

  • go github.com/sirupsen/logrus 1.8.3, 1.9.1, 1.9.3
  • turbopuffer logrus 1.8.3
  • golang-logrus Debian 14 1.9.3-1

debian advisories DEBIAN-CVE-2025-65637

  • perf openshift 4.15 5.14.0-284.155.1.el9_2
  • rtla openshift 4.15 5.14.0-284.155.1.el9_2
  • runc openshift 4.15 4:1.2.9-1.rhaos4.16.el8
  • runc openshift 4.15 4:1.2.9-1.rhaos4.16.el9
  • kernel openshift 4.15 5.14.0-284.155.1.el9_2
  • bpftool openshift 4.15 7.0.0-284.155.1.el9_2
  • kernel-rt openshift 4.15 5.14.0-284.155.1.rt14.440.el9_2
  • kernel-64k openshift 4.15 5.14.0-284.155.1.el9_2

red hat advisories RHSA-2026:1540RHSA-2026:15940RHSA-2026:15941RHSA-2026:12273RHSA-2026:13971RHSA-2026:11804

  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20260123T022811-150000.1.140.1
  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20251230T014957-150000.1.134.1

suse advisories SUSE-SU-2026:0292-1SUSE-SU-2026:0037-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

  • crit AlmaLinux 8 3.18-5.module_el8.10.0+4047+545787c4
  • crit AlmaLinux 8 3.18-5.module_el8.10.0+3901+4b80ecd7
  • crit AlmaLinux 8 3.18-5.module_el8.10.0+4120+03ad4b47
  • crit AlmaLinux 8 3.18-5.module_el8.10.0+3845+87b84552
  • criu AlmaLinux 8 3.18-5.module_el8.10.0+4089+ce72bbbe
  • criu AlmaLinux 8 3.18-5.module_el8.10.0+4120+03ad4b47
  • criu AlmaLinux 8 3.18-5.module_el8.10.0+3876+e55593a8
  • criu AlmaLinux 8 3.18-5.module_el8.10.0+3909+6e1c1eb7

almalinux advisories ALSA-2026:3428

  • criu Rocky Linux 8 3.18-5.module+el8.10.0+2001+6a33db9f
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+40047+0c0a73f4
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1948+4b5cd4a9
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1874+ce489889
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1815+5fe7415e
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1880+8e896d1b
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1872+2e18eb19
  • criu Rocky Linux 8 3.18-5.module+el8.10.0+1825+623b0c20

rocky linux advisories RLSA-2026:3428

  • cni-plugins Azure Linux 3.0 1.4.0-4
  • containerized-data-importer Azure Linux 3.0 1.62.0-1
  • dcos-cli Azure Linux 3.0 1.2.0-20
  • flannel Azure Linux 3.0 0.24.2-22
  • influxdb Azure Linux 3.0 2.7.5-10
  • kata-containers Azure Linux 3.0 3.19.1.kata2-6
  • kubernetes Azure Linux 3.0 1.30.10-18
  • cert-manager CBL-Mariner 2.0 1.11.2-25

azure linux advisories AZL-71510AZL-71513AZL-71516AZL-71519AZL-71534AZL-71537

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-65637 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-65637 updated cvss 7.5

github.com/sirupsen/logrus: github.com/sirupsen/logrus: Denial-of-Service due to large single-line payload

  • Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-monitor-rhel9, openshift-sandboxed-containers/osc-rhel9-operator, openshift-sandboxed-containers/osc-operator-bundle, openshift-sandboxed-containers/osc-podvm-builder-rhel9, openshift-sandboxed-containers/osc-podvm-payload-rhel9 Red Hat ExternalDNS Operator edo/external-dns-rhel8, edo/external-dns-rhel9
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Kube Descheduler Operator kube-descheduler-operator/kube-descheduler-rhel9-operator, kube-descheduler-operator/kube-descheduler-operator-bundle
    affected: workaround, no fix available “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/vector-rhel9, openshift-logging/fluentd-rhel9, openshift-logging/eventrouter-rhel9, openshift-logging/logging-loki-rhel9, openshift-logging/loki-rhel9-operator, openshift-logging/opa-openshift-rhel9, +6 more Red Hat Logical Volume Manager Storage lvms4/lvms-rhel9-operator, lvms4/lvms-must-gather-rhel8, lvms4/lvms-must-gather-rhel9
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Migration Toolkit for Applications 7 mta/mta-java-external-provider-rhel9, mta/mta-generic-external-provider-rhel9 Red Hat Migration Toolkit for Containers rhmtc/openshift-migration-controller-rhel8, rhmtc/openshift-migration-hook-runner-rhel8, rhmtc/openshift-migration-velero-plugin-for-mtc-rhel8
    affected: workaround, no fix available “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat mirror registry for Red Hat OpenShift openshift/mirror-registry-rhel8
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat mirror registry for Red Hat OpenShift 2 openshift/mirror-registry-rhel8 Red Hat Multicluster Engine for Kubernetes multicluster-engine/hypershift-addon-rhel9-operator
    affected: workaround, no fix available “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel9, workload-availability/node-healthcheck-rhel8-operator, workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift API for Data Protection oadp/oadp-velero-rhel8, oadp/oadp-rhel8-operator, oadp/oadp-rhel9-operator, oadp/oadp-mustgather-rhel8, oadp/oadp-velero-plugin-for-aws-rhel8, oadp/oadp-velero-plugin-for-aws-rhel9, +11 more Red Hat OpenShift Developer Tools and Services helm Red Hat OpenShift Pipelines openshift-pipelines/pipelines-triggers-webhook-rhel8, openshift-pipelines/pipelines-triggers-webhook-rhel9, openshift-pipelines/pipelines-triggers-controller-rhel8, openshift-pipelines/pipelines-triggers-controller-rhel9, openshift-pipelines/pipelines-triggers-core-interceptors-rhel8, openshift-pipelines/pipelines-triggers-core-interceptors-rhel9, +2 more Red Hat OpenShift Secondary Scheduler Operator openshift-secondary-scheduler-operator/secondary-scheduler-rhel9-operator, openshift-secondary-scheduler-operator/secondary-scheduler-operator-bundle Red Hat OpenShift Service Mesh 2 openshift-service-mesh/grafana-rhel8
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat 3scale API Management Platform 2 3scale-amp26/operator, 3scale-amp26/3scale-operator, 3scale-amp2/3scale-rhel7-operator, 3scale-amp2/3scale-rhel9-operator, 3scale-amp2/3scale-operator-bundle Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9, rhacm2/config-policy-controller-rhel9, rhacm2/multicluster-operators-subscription-rhel9
    affected: workaround, no fix available, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
show 17 more
  • Red Hat Enterprise Linux 8 rhel8/grafana, osbuild-composer, osbuild-composer-core, osbuild-composer-worker, osbuild-composer-dnf-json Red Hat Enterprise Linux 9 runc, podman, skopeo, buildah, toolbox, podman-tests, +13 more
    affected: workaround, no fix available “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-rhel8-operator, rhoai/odh-kueue-controller-rhel8, rhoai/odh-training-operator-rhel8, rhoai/odh-notebook-controller-rhel8, rhoai/odh-kf-notebook-controller-rhel8, rhoai/odh-data-science-pipelines-operator-controller-rhel8
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat OpenShift Container Platform 4 podman, skopeo, podman-tests, skopeo-tests, podman-docker, podman-remote, +85 more
    affected: workaround, no fix available, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Openshift Data Foundation 4 odf4/cephcsi-rhel9, odf4/odf-multicluster-rhel9-operator Red Hat OpenShift for Windows Containers openshift4-wincw/windows-machine-config-rhel9-operator, openshift4-wincw/windows-machine-config-operator-bundle
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9, openshift-gitops-1/argocd-agent-rhel8
    affected: workaround, no fix available, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat OpenShift Virtualization 4 kubevirt, container-native-virtualization/virt-api, container-native-virtualization/virt-handler, container-native-virtualization/virt-launcher, container-native-virtualization/virt-operator, container-native-virtualization/virt-api-rhel9, +39 more Red Hat Quay 3 quay/quay-rhel8, quay/clair-rhel8, quay/quay-operator-rhel8, quay/quay-operator-bundle Red Hat Web Terminal web-terminal/web-terminal-exec-rhel8, web-terminal/web-terminal-exec-rhel9, web-terminal-tech-preview/web-terminal-exec-rhel8
    affected: workaround, no fix planned “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.”
  • Red Hat Ironic content for Red Hat OpenShift Container Platform 4.15 python-eventlet 0.33.1-7.el9, python3-eventlet 0.33.1-7.el9
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:1540
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2 1770249158
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:2351
  • Red Hat Enterprise Linux AppStream (v. 8) crit 3.18-5.module+el8.10.0+23963+b64d8032, criu 3.18-5.module+el8.10.0+23963+b64d8032, runc 1.2.9-3.module+el8.10.0+23963+b64d8032, crun 1.14.3-2.module+el8.10.0+23963+b64d8032, udica 0.2.6-21.module+el8.10.0+23963+b64d8032, conmon 2.1.10-1.module+el8.10.0+23963+b64d8032, +27 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:3428
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) osbuild-composer 46.3-5.el8_6, osbuild-composer-core 46.3-5.el8_6, osbuild-composer-worker 46.3-5.el8_6, osbuild-composer-dnf-json 46.3-5.el8_6, crit 3.15-3.module+el8.6.0+24209+25a14987, criu 3.15-3.module+el8.6.0+24209+25a14987, +31 more Red Hat Enterprise Linux AppStream E4S (v.8.6) osbuild-composer 46.3-5.el8_6, osbuild-composer-core 46.3-5.el8_6, osbuild-composer-worker 46.3-5.el8_6, osbuild-composer-dnf-json 46.3-5.el8_6, crit 3.15-3.module+el8.6.0+24209+25a14987, criu 3.15-3.module+el8.6.0+24209+25a14987, +31 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:10703
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) osbuild-composer 75-6.el8_8, osbuild-composer-core 75-6.el8_8, osbuild-composer-worker 75-6.el8_8, osbuild-composer-dnf-json 75-6.el8_8, crit 3.15-4.module+el8.8.0+23884+2031fc78, criu 3.15-4.module+el8.8.0+23884+2031fc78, +34 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:4693
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) runc 1.2.9-1.el9_0, podman 4.2.0-6.el9_0.6, buildah 1.26.9-1.el9_0.3, skopeo 1.8.0-4.1.el9_0.3, podman-tests 4.2.0-6.el9_0.6, osbuild-composer 46.3-6.el9_0, +11 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:8325
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) runc 1.2.9-1.el9_2.1, podman 4.4.1-22.el9_2.5, buildah 1.29.5-1.el9_2.2, skopeo 1.11.4-0.1.el9_2.5, toolbox 0.0.99.4.1-1.el9_2, osbuild-composer 76.1-4.el9_2, +12 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:4532
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) runc 1.2.9-1.el9_4, toolbox 0.0.99.5.1-2.el9_4, toolbox-tests 0.0.99.5.1-2.el9_4
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:0425
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) osbuild-composer 46.3-5.el8_6, osbuild-composer-core 46.3-5.el8_6, osbuild-composer-worker 46.3-5.el8_6, osbuild-composer-dnf-json 46.3-5.el8_6, crit 3.15-3.module+el8.6.0+24209+25a14987, criu 3.15-3.module+el8.6.0+24209+25a14987, +31 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:10703
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) osbuild-composer 75-6.el8_8, osbuild-composer-core 75-6.el8_8, osbuild-composer-worker 75-6.el8_8, osbuild-composer-dnf-json 75-6.el8_8, crit 3.15-4.module+el8.8.0+23884+2031fc78, criu 3.15-4.module+el8.8.0+23884+2031fc78, +34 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:4693
  • Red Hat OpenShift Container Platform 4.12 openshift4 1770040667, openshift4 1770040836, openshift4 1770041173, openshift4 1770041992, openshift4 1770042014, openshift4 1771322552, +28 more
    fixed: vendor fix “Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.” RHSA-2026:12273

11 more fixed, 90 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
11mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/sirupsen/logrus/issues/1370 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/mjuanxd/logrus-dos-poc referenced PoC, tagged "exploit" by a source, unverified
  • security.snyk.io https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/sirupsen/logrus
<1.8.3
>=1.9.0, <1.9.1
>=1.9.2, <1.9.3
1.8.3
1.9.1
1.9.3

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.