CVE-2026-35091— Corosync: corosync: denial of service and information disclosure via crafted udp packet
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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: NVD (National Vulnerability Database)
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. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对函数返回值的检查不正确
Source: NVD (National Vulnerability Database)
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 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 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 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 Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| 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 |
|---|
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No public POC found.
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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 |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de - CVE-2026-34000
Xwayland: xorg: x.org x server: information disclosure and d
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-253
V. Comments for CVE-2026-35091
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