CVE-2022-49279: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-49279 is a vulnerability in the Linux kernel's NFSD (Network File System daemon) component, specifically affecting 32-bit systems. The vulnerability was discovered and disclosed on February 26, 2025, and involves an integer overflow vulnerability in the handling of array operations. The issue affects various Linux kernel versions and distributions, including Ubuntu and Red Hat systems (NVD).

The vulnerability occurs in the Linux kernel's NFSD component where the operation len * sizeof(*p) can result in an integer overflow on 32-bit systems. This issue is present in the xdr_stream_decode_uint32_array function within the include/linux/sunrpc/xdr.h file. The vulnerability was patched by adding a size check to prevent the overflow condition, specifically by adding the check if (len > SIZE_MAX / sizeof(*p)) before performing the multiplication operation (Kernel Patch).

The integer overflow vulnerability in NFSD could potentially lead to memory corruption or system instability on affected 32-bit Linux systems. While the specific impact details are not fully documented, integer overflow vulnerabilities typically can result in buffer overflows, which could potentially be exploited to cause denial of service or possibly execute arbitrary code (Ubuntu Security).

The vulnerability has been patched in the Linux kernel, with fixes being backported to various stable kernel versions. Ubuntu and other distributions have released updates to address this vulnerability. Users are advised to update their systems to the latest kernel version that includes the fix. For Ubuntu 18.04 LTS, the fix is included in version 5.4.0-1078.84~18.04.1 of the linux-aws package (Ubuntu Security).