Linux Kernel Privilege Escalation Vulnerability (CVE-2024-1086) Notice
June 6, 2024
Overview Recently, NSFOCUS CERT detected that the details and verification tools of a Linux kernel privilege escalation vulnerability (CVE-2024-1086) are disclosed on the internet. Because the netfilter: nf _ tables component of the Linux kernel has a post-release reuse vulnerability, the nft _ verdict _ init () function allows positive values to be used as […]
Linux Kernel Privilege Escalation Vulnerability (CVS 2023-32233) Notice
May 18, 2023
Overview Recently, NSFOCUS CERT found that the PoC of Linux Kernel privilege escalation vulnerability (CVE-2023-32233) was publicly disclosed online. There is a use-after-free vulnerability in Linux kernel’s subsystem Netfilter nf_tables, which can be exploited by authenticated local attackers to perform arbitrary read and write operations in kernel memory, ultimately elevating permissions to ROOT. The CVSS […]
Multiple Security Vulnerabilities in Linux Kernel
December 27, 2022
Overview On December 26, 2022, NSFOCUS CERT detected multiple security vulnerabilities in Linux Kernel released online, relevant users are requested to take protective measures as soon as possible. Linux Kernel Remote Code Execution Vulnerability (CVE-2022-47939): A remote code execution vulnerability exists in Linux Kernel SMB2_TREE_DISCONNECT command processing. Due to the lack of verification of the […]
Linux Kernel Privilege Escalation Vulnerability (CVE-2022-0847) Alert
March 10, 2022
Overview Recently, NSFOCUS CERT detected that a security researcher disclosed a local privilege escalation vulnerability (CVE-2022-0847) in the Linux kernel. Due to a flaw in the correct initialization of the copy_page_to_iter_pipe and push_pipe functions in the Linux kernel, an attacker can overwrite the data in any readable file by exploiting this vulnerability, thereby escalating ordinary […]
Linux Kernel Arbitrary Code Execution Vulnerability (CVE-2021-3490) Threat Alert
September 18, 2021
Overview Recently, NSFOCUS CERT found that a security researcher published details and the PoC of an arbitrary code execution vulnerability (CVE-2021-3490) in eBPF and exploited this vulnerability to cause local privilege escalation on Ubuntu 20.10 and 21.04. This vulnerability exists because the eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the […]
Linux Kernel Privilege Escalation Vulnerability (CVE-2021-33909) Threat Alert
August 13, 2021
Overview Recently, NSFOCUS CERT discovered that the Qualys research team disclosed a local privilege escalation vulnerability (CVE-2021-33909, aka Sequoia) in the filesystem layer in the Linux kernel. It is a size_t-to-int type conversion vulnerability in the seq_file interface in the Linux kernel. fs/seq_file.c’s improper restriction of the seq buffer allocation may cause an integer overflow, […]
