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Recently, NSFOCUS CERT monitored that Linux released a security update to fix the Linux Kernel IPv4 TCP use-after-free vulnerability (CVE-2026-98432). Due to a race condition issue in the Linux kernel IPv4 network subsystem when concurrently handling TCP connection requests or socket migration, an unauthenticated attacker can trigger a use-after-free by sending sp...
On October 12, 2026, AI security firm AIR Security disclosed a network isolation bypass technique for the Vercel Sandbox, dubbed “VerCellBreak.” An AI agent controlled by an attacker can smuggle private keys out of the sandbox by leveraging a standard feature in the TLS certificate chain validation process, without any direct communication ever occurring between t...
Recently, NSFOCUS CERT monitored the public disclosure of PHP Remote Code Execution (RCE) vulnerabilities (CVE-2026-109618 / CVE-2026-109619).
Due to memory management flaws in PHP Core—where longjmp() handles Out-Of-Memory (OOM) errors leading to failed memory allocations, as well as various global state handling operations—a Use-After-Free (UAF) condit...
In August 2026, the global threat hunting system of the FUYING Lab detected a total of 20 APT attack activities. These activities were primarily concentrated in regions including East Asia, Eastern Europe, Middle East, and South Asia as shown in the figure below.
Regarding the activity levels of different groups, the most active ...
Recently, NSFOCUS CERT monitored that GitLab released a security update to fix the GitLab Remote Code Execution Vulnerability (CVE-2026-97229). Due to insufficient validation of regular expressions in GitLab’s CI/CD configuration, unauthenticated attackers can construct special regular expressions within the CI/CD configuration to tri...