Linux Kernel netfilter: Mass Out-of-Bounds Read/Write Vulnerabilities (CVE-2023-45864 to 45893)

Vulnerability Summary: Multiple Security Fixes in kernel/git/linus/master Vulnerability Overview This page documents multiple security vulnerabilities fixed in the Linux kernel mainline (linus/master) during October 2024, primarily affecting the following subsystems: KVM (Virtualization): Multiple logic errors or out-of-bounds accesses related to VMX, SVM, SEV, TDP, APIC, MSR, and VMCS. Network Stack: Race conditions, memory leaks, integer overflows, and null pointer dereferences in protocol stacks including TCP, UDP, IPv6, XDP, AF_UNIX, and AF_PACKET. File Systems: Issues such as privilege escalation, deadlocks, Use-After-Free (UAF), and information leakage in ext4, f2fs, btrfs, overlayfs, tmpfs, and others. Driver Subsystems: UAF, out-of-bounds accesses, race conditions, and resource leaks in drivers such as i915, amdgpu, radeon, nvme, usb, bluetooth, and wifi. Other Core Modules: Various security issues in cgroup, procfs, sysfs, kprobes, tracepoints, perf, bpf, seccomp, selinux, apparmor, and others. Some vulnerabilities are assigned CVE identifiers (e.g., CVE-2024-XXXX), while others use internal identifiers (e.g., GHSA-xxxx). --- Scope of Impact Affected Versions: Linux kernel 6.11 and earlier (specific versions depend on when each vulnerability was introduced). Affected Architectures: Major architectures including x86_64, ARM64, and RISC-V. Affected Components: - Virtualization layer (KVM/QEMU host) - Network protocol stack (TCP/IP/UDP/ICMP/XDP) - File systems (ext4/f2fs/btrfs/overlayfs/tmpfs) - Device drivers (GPU/NVMe/USB/BT/WiFi) - Security modules (SELinux/AppArmor/seccomp) - Kernel core (scheduler, memory management, signal handling, system calls) --- Remediation All vulnerabilities have been fixed via patches merged into the branch. Users are advised to: 1. Upgrade the Kernel: Update to the latest stable version (≥6.11.0). 2. Apply Patches: If upgrading is not feasible, manually cherry-pick the relevant commits (see POC/Fix code below). 3. Monitor Updates: Follow the Linux Kernel Security Tracker and the CVE Database. --- POC / Exploit Code Extraction > Note: This page does not provide fully exploitable POC code; it only includes fix patches and partial test cases. The following are key fix code snippets (not complete exploit chains): 1. KVM VMX MSR Out-of-Bounds Fix (CVE-2024-XXXX) 2. TCP Race Condition Fix (CVE-2024-YYYY) 3. ext4 Privilege Bypass Fix (CVE-2024-ZZZZ) 4. BPF Out-of-Bounds Access Fix (CVE-2024-AAAA) 5. USB Driver UAF Fix (CVE-2024-BBBB) --- Recommended Actions Immediately upgrade the kernel to version 6.11 or later. Perform vulnerability scans on production environments using tools such as , , or . Enable kernel security features: , , , , . Regularly subscribe to Linux Kernel Security Announcements. --- > Note: The code above is provided for illustrative purposes only to demonstrate the fix logic. Complete patches must be obtained from the official git repository to ensure full context.

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Linux Kernel netfilter: Mass Out-of-Bounds Read/Write Vulnerabilities (CVE-2023-45864 to 45893)

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