CVE-2026-15812

The kronosnet source

Security Fix(es):

A vulnerability was found in kronosnet's (version <=1.34) cryptographic configuration management. The framework does not correctly zero-out or wipe sensitive memory segments after executing changes to its cryptographic configuration. This omission leaves raw encryption keys resident in memory after the associated structures are freed. A local attacker capable of leveraging memory disclosure techniques could exploit this flaw to retrieve the active encryption key, allowing them to decrypt cluster network communications or inject malicious packets to cause severe high-availability cluster instability.(CVE-2026-15811)

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.(CVE-2026-15812)

A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34). The internal reassembly code does not properly validate sequence numbers of incoming payload fragments. An attacker can exploit this lack of verification by transmitting malformed packets with corrupted sequence parameters. Under specific conditions, this forces the packet processing layer to parse data outside the designated bounds of the internal memory structures, causing an out-of-bounds memory access or heap corruption. This behavior can result in sudden application crashes or system instability.(CVE-2026-15813)

The kronosnet source

Security Fix(es):

A vulnerability was found in kronosnet's (version <=1.34) cryptographic configuration management. The framework does not correctly zero-out or wipe sensitive memory segments after executing changes to its cryptographic configuration. This omission leaves raw encryption keys resident in memory after the associated structures are freed. A local attacker capable of leveraging memory disclosure techniques could exploit this flaw to retrieve the active encryption key, allowing them to decrypt cluster network communications or inject malicious packets to cause severe high-availability cluster instability.(CVE-2026-15811)

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.(CVE-2026-15812)

A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34). The internal reassembly code does not properly validate sequence numbers of incoming payload fragments. An attacker can exploit this lack of verification by transmitting malformed packets with corrupted sequence parameters. Under specific conditions, this forces the packet processing layer to parse data outside the designated bounds of the internal memory structures, causing an out-of-bounds memory access or heap corruption. This behavior can result in sudden application crashes or system instability.(CVE-2026-15813)

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.

Encryption key exposure in memory after cryptographic configuration changes. (CVE-2026-15811) Access control list bypass via link id spoofing on unencrypted dynamic links. (CVE-2026-15812) Memory corruption and out-of-bounds access via malformed network packet defragmentation. (CVE-2026-15813)

These are all security issues fixed in the libknet-devel-1.33-2.1 package on the GA media of openSUSE Tumbleweed.

This update for kronosnet fixes the following issues:

• CVE-2026-15811: improper sanitization of sensitive memory locations following cryptographic configuration adjustments can lead to potential exposure of encryption keys (bsc#1271923).
• CVE-2026-15812: improper verification of packet origins allows for access control list (ACL) bypass via ID spoofing (bsc#1271924).
• CVE-2026-15813: improper validation during fragment reassembly can trigger memory corruption or out-of-bounds memory access (bsc#1271925).

This update for kronosnet fixes the following issues:

• CVE-2026-15811: improper sanitization of sensitive memory locations following cryptographic configuration adjustments can lead to potential exposure of encryption keys (bsc#1271923).
• CVE-2026-15812: improper verification of packet origins allows for access control list (ACL) bypass via ID spoofing (bsc#1271924).
• CVE-2026-15813: improper validation during fragment reassembly can trigger memory corruption or out-of-bounds memory access (bsc#1271925).

This update for kronosnet fixes the following issues:

• CVE-2026-15811: improper sanitization of sensitive memory locations following cryptographic configuration adjustments can lead to potential exposure of encryption keys (bsc#1271923).
• CVE-2026-15812: improper verification of packet origins allows for access control list (ACL) bypass via ID spoofing (bsc#1271924).
• CVE-2026-15813: improper validation during fragment reassembly can trigger memory corruption or out-of-bounds memory access (bsc#1271925).