google/security-research
Jan 2025 – Feb 2026
4 Months active
Languages Used
AssemblyCMakefile
Technical Skills
C ProgrammingHeap SprayingIP SetsKASLR BypassKernel DebuggingLinux Kernel Exploitation
liona24
PROFILE
Liona24
Lion Ackermann focused on Linux kernel security research and vulnerability mitigation in the google/security-research repository, addressing complex privilege escalation risks. Over four months, Lion delivered targeted mitigations and exploit demonstrations for multiple CVEs, including issues in nftables, ipset, traffic control, and kernel TLS. Using C and Assembly, Lion analyzed vulnerabilities such as use-after-free, race conditions, and out-of-bounds writes, then implemented and documented mitigations with reproducible proof-of-concept code. The work emphasized kernel debugging, exploit development, and system programming, providing detailed documentation and build hygiene improvements. This approach enabled downstream teams to verify fixes and strengthened the overall security posture.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
7Total
Bugs
6
Commits
7
Features
0
Lines of code
41,102
Activity Months4
Your Network
25 peopleWork History
February 2026
2 Commits
Feb 1, 2026February 2026 monthly summary for google/security-research: focused on enhancing security posture through targeted vulnerability work, documentation, and build hygiene. Delivered reproducible security testing materials for CVE-2025-38350 in HFSC qdisc and implemented a mitigation for CVE-2025-39946 in kernel TLS, with accompanying build workflow improvements.
2 Commits
Feb 1, 2026February 2026 monthly summary for google/security-research: focused on enhancing security posture through targeted vulnerability work, documentation, and build hygiene. Delivered reproducible security testing materials for CVE-2025-38350 in HFSC qdisc and implemented a mitigation for CVE-2025-39946 in kernel TLS, with accompanying build workflow improvements.
February 2026
October 2025
2 Commits
Oct 1, 2025Month 2025-10: Security research and disclosure work focused on Linux traffic control vulnerabilities in google/security-research. Delivered disclosures and exploit demonstrations for two Linux kernel tc vulnerabilities (CVE-2024-53164 and CVE-2025-21700), illustrating potential privilege-escalation risks in CHOKe and qdisc structures. Documented mitigations and recommended patching strategies to support faster remediation. Contributed kernelCTF-based disclosures with two commits to improve reproducibility and awareness. This work strengthens the security posture of Linux networking components and informs risk-based prioritization for patching.
October 2025
2 Commits
Oct 1, 2025Month 2025-10: Security research and disclosure work focused on Linux traffic control vulnerabilities in google/security-research. Delivered disclosures and exploit demonstrations for two Linux kernel tc vulnerabilities (CVE-2024-53164 and CVE-2025-21700), illustrating potential privilege-escalation risks in CHOKe and qdisc structures. Documented mitigations and recommended patching strategies to support faster remediation. Contributed kernelCTF-based disclosures with two commits to improve reproducibility and awareness. This work strengthens the security posture of Linux networking components and informs risk-based prioritization for patching.
September 2025
1 Commits
Sep 1, 2025September 2025 (2025-09) monthly summary for google/security-research: Focused on risk discovery, mitigation, and documentation for CVE-2024-53141 in the bitmap:ip (ipset) subsystem. Delivered a mitigation patch and accompanying exploit demonstration docs to reduce exposure and guide downstream consumers.
1 Commits
Sep 1, 2025September 2025 (2025-09) monthly summary for google/security-research: Focused on risk discovery, mitigation, and documentation for CVE-2024-53141 in the bitmap:ip (ipset) subsystem. Delivered a mitigation patch and accompanying exploit demonstration docs to reduce exposure and guide downstream consumers.
September 2025
January 2025
2 Commits
Jan 1, 2025January 2025 monthly work summary for google/security-research focused on security research and kernel hardening. Key features delivered include two security mitigations for Linux kernel CVEs implemented in kernelCTF: - CVE-2024-27397 (Nftables UAF) mitigation added (commit 724373963e4f951abd0605f240f6d40a75564275). - CVE-2024-39503 (IP_SET race condition) mitigation added (commit d72e002fe83480b9133ae9b5ff023af0367cf233). Each mitigation is accompanied by vulnerability explanations, mitigation bypass discussions, and payload construction details, along with documentation and PoC code.
January 2025
2 Commits
Jan 1, 2025January 2025 monthly work summary for google/security-research focused on security research and kernel hardening. Key features delivered include two security mitigations for Linux kernel CVEs implemented in kernelCTF: - CVE-2024-27397 (Nftables UAF) mitigation added (commit 724373963e4f951abd0605f240f6d40a75564275). - CVE-2024-39503 (IP_SET race condition) mitigation added (commit d72e002fe83480b9133ae9b5ff023af0367cf233). Each mitigation is accompanied by vulnerability explanations, mitigation bypass discussions, and payload construction details, along with documentation and PoC code.
Activity
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Quality Metrics
Correctness88.6%
Maintainability77.2%
Architecture88.6%
Performance77.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyCMakefile
Technical Skills
C ProgrammingC programmingExploit DevelopmentHeap SprayingIP SetsKASLR BypassKernel DebuggingKernel ExploitationLinux Kernel ExploitationLinux Kernel InternalsNFTablesNetfilterNetlinkPrivilege EscalationROP Chains
Repositories Contributed To
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