Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2021-44879 Wenqing Liu reported a NULL pointer dereference in the f2fs implementation. An attacker able to mount a specially crafted image can take advantage of this flaw for denial of service. CVE-2023-5178 Alon Zahavi reported a use-after-free flaw in the NVMe-oF/TCP subsystem in the queue initialization setup, which may result in denial of service or privilege escalation. CVE-2023-5197 Kevin Rich discovered a use-after-free flaw in the netfilter subsystem which may result in denial of service or privilege escalation for a user with the CAP_NET_ADMIN capability in any user or network namespace. CVE-2023-5717 Budimir Markovic reported a heap out-of-bounds write vulnerability in the Linux kernel"s Performance Events system caused by improper handling of event groups, which may result in denial of service or privilege escalation. The default settings in Debian prevent exploitation unless more permissive settings have been applied in the kernel.perf_event_paranoid sysctl. CVE-2023-6121 Alon Zahavi reported an out-of-bounds read vulnerability in the NVMe-oF/TCP which may result in an information leak. CVE-2023-6531 Jann Horn discovered a use-after-free flaw due to a race condition when the unix garbage collector"s deletion of a SKB races with unix_stream_read_generic on the socket that the SKB is queued on. CVE-2023-6817 Xingyuan Mo discovered that a use-after-free in Netfilter"s implementation of PIPAPO may result in denial of service or potential local privilege escalation for a user with the CAP_NET_ADMIN capability in any user or network namespace. CVE-2023-6931 Budimir Markovic reported a heap out-of-bounds write vulnerability in the Linux kernel"s Performance Events system which may result in denial of service or privilege escalation. The default settings in Debian prevent exploitation unless more permissive settings have been applied in the kernel.perf_event_paranoid sysctl. CVE-2023-6932 A use-after-free vulnerability in the IPv4 IGMP implementation may result in denial of service or privilege escalation. CVE-2023-25775 Ivan D Barrera, Christopher Bednarz, Mustafa Ismail and Shiraz Saleem discovered that improper access control in the Intel Ethernet Controller RDMA driver may result in privilege escalation. CVE-2023-34324 Marek Marczykowski-Gorecki reported a possible deadlock in the Xen guests event channel code which may allow a malicious guest administrator to cause a denial of service. CVE-2023-35827 Zheng Wang reported a use-after-free flaw in the Renesas Ethernet AVB support driver. CVE-2023-45863 A race condition in library routines for handling generic kernel objects may result in an out-of-bounds write in the fill_kobj_path function. CVE-2023-46813 Tom Dohrmann reported that a race condition in the Secure Encrypted Virtualization implementation when accessing MMIO registers may allow a local attacker in a SEV guest VM to cause a denial of service or potentially execute arbitrary code. CVE-2023-46862 It was discovered that a race condition in the io_uring subsystem may result in a NULL pointer dereference, causing a denial of service. CVE-2023-51780 It was discovered that a race condition in the ATM subsystem may lead to a use-after-free. CVE-2023-51781 It was discovered that a race condition in the Appletalk subsystem may lead to a use-after-free. CVE-2023-51782 It was discovered that a race condition in the Amateur Radio X.25 PLP support may lead to a use-after-free. This module is not auto-loaded on Debian systems, so this issue only affects systems where it is explicitly loaded.