CVE-2026-35091— Corosync: corosync: denial of service and information disclosure via crafted udp packet
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Corosync是The Corosync Cluster Engine开源的一个 Corosync 集群发动机。 Corosync存在安全漏洞，该漏洞源于成员资格提交令牌健全性检查存在错误的返回值，可能导致越界读取，造成拒绝服务并可能泄露有限内存内容。
Affected Version Matrix 19
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I. Basic Information for CVE-2026-35091
Vulnerability Information
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Vulnerability Title
Corosync: corosync: denial of service and information disclosure via crafted udp packet
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对函数返回值的检查不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Corosync 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Corosync是The Corosync Cluster Engine开源的一个 Corosync 集群发动机。 Corosync存在安全漏洞，该漏洞源于成员资格提交令牌健全性检查存在错误的返回值，可能导致越界读取，造成拒绝服务并可能泄露有限内存内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.1.9-2.el10_1.1 ~ * |
cpe:/o:redhat:enterprise_linux:10.1
|
|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.1.10-1.el10_2.1 ~ * |
cpe:/o:redhat:enterprise_linux:10.2
|
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.1.9-1.el10_0.2 ~ * |
cpe:/o:redhat:enterprise_linux_eus:10.0
|
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:2.4.5-7.el7_9.3 ~ * |
cpe:/o:redhat:enterprise_linux:7::server
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.1.8-1.el8_10.1 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:3.1.0-3.el8_4.2 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:3.1.0-3.el8_4.2 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:3.1.5-2.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | 0:3.1.5-2.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | 0:3.1.5-2.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:3.1.7-1.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:3.1.7-1.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.1.9-2.el9_7.1 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.1.10-1.el9_8.1 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | 0:3.1.5-3.el9_0.1 ~ * |
cpe:/a:redhat:rhel_e4s:9.0::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:3.1.7-1.el9_2.1 ~ * |
cpe:/a:redhat:rhel_e4s:9.2::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | 0:3.1.8-1.el9_4.1 ~ * |
cpe:/a:redhat:rhel_eus:9.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:3.1.9-2.el9_6.1 ~ * |
cpe:/a:redhat:rhel_eus:9.6::appstream
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
II. Public POCs for CVE-2026-35091
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-35091 (16)
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🔗 RHSA-2026:14216 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14210 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14214 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14215 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:13644 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14212 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:19043 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14211 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Other References for CVE-2026-35091 (1)
Same Patch Batch · Red Hat · 2026-04-01 · 4 CVEs total
| CVE-2026-35093 | 8.8 HIGH | Libinput: libinput: unauthorized code execution and information disclosure through lua byt |
| CVE-2026-35092 | 7.5 HIGH | Corosync: corosync: denial of service via integer overflow in join message validation |
| CVE-2026-35094 | 3.3 LOW | Libinput: libinput: information disclosure via dangling pointer in lua plugin handling |
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V. Comments for CVE-2026-35091
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