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CVE-2026-15812— Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynamic links

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.

Kronosnet Kronosnet是Kronosnet组织的一个网络抽象层，专为高可用性用例而设计，其中冗余、安全性、容错性和快速故障转移是核心要求。 Kronosnet 1.34及之前版本存在授权问题漏洞，该漏洞源于对内访问控制列表（ACL）子系统中传入数据包内链路ID的验证信任机制不当，可能导致远程未经身份验证的攻击者通过伪造特制网络帧中的链路ID绕过ACL框架，将任意数据包注入应用层，从而造成数据损坏或服务不稳定。

CVSS 4.8 · Medium EPSS 0.26% · P17

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
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I. Basic Information for CVE-2026-15812

Vulnerability Information
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Vulnerability Title
Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynamic links
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Kronosnet 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kronosnet Kronosnet是Kronosnet组织的一个网络抽象层，专为高可用性用例而设计，其中冗余、安全性、容错性和快速故障转移是核心要求。 Kronosnet 1.34及之前版本存在授权问题漏洞，该漏洞源于对内访问控制列表（ACL）子系统中传入数据包内链路ID的验证信任机制不当，可能导致远程未经身份验证的攻击者通过伪造特制网络帧中的链路ID绕过ACL框架，将任意数据包注入应用层，从而造成数据损坏或服务不稳定。
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 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-15812

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III. Intelligence Information for CVE-2026-15812

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Vendor Advisories for CVE-2026-15812 (2)

Same Patch Batch · Red Hat · 2026-07-21 · 20 CVEs total

CVE-2026-59851 8.8 HIGH Libssh: libssh: authentication bypass via missing gssapi principal check
CVE-2026-16493 7.8 HIGH Ansible-core: argument injection in ansible-galaxy collection install via git clone (incom
CVE-2026-16445 7.5 HIGH Dracut: dracut: root code execution via dhcp options command injection in networkmanager i
CVE-2026-15927 6.8 MEDIUM Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url vali
CVE-2026-15370 6.7 MEDIUM Libssh: libssh: stack buffer overflow in sftp server longname construction
CVE-2026-59843 6.5 MEDIUM Libssh: libssh: denial of service via zero advertised channel packet size
CVE-2026-16461 6.5 MEDIUM Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list form
CVE-2026-59844 6.5 MEDIUM Libssh: libssh: denial of service via oversized sftp read length
CVE-2026-59847 5.9 MEDIUM Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification
CVE-2026-15811 5.8 MEDIUM Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration
CVE-2026-59845 5.3 MEDIUM Libssh: libssh: denial of service via unchecked proxycommand fork() failure
CVE-2026-59848 5.3 MEDIUM Libssh: libssh: denial of service via sftp responses with unknown request ids
CVE-2026-59850 4.3 MEDIUM Libssh: libssh: use-after-free via data callbacks on closed channels
CVE-2026-12548 4.2 MEDIUM Libsoup: heap out-of-bounds read in libsoup due to integer truncation
CVE-2026-59846 3.9 LOW Libssh: libssh: information disclosure via proxycommand %r username expansion
CVE-2026-59842 3.7 LOW Libssh: libssh: information disclosure via short gssapi curve25519 public key
CVE-2026-12547 3.4 LOW Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on pr
CVE-2026-59849 3.1 LOW Libssh: libssh: denial of service via automatic certificate authentication loop
CVE-2026-16517 2.9 LOW Libarchive: libarchive: signed integer overflow in archive_write_zip_header

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-290