Threats Tagged 'cve-2026-31694'

This security update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.52 addresses multiple vulnerabilities including a heap overflow in the NFSv4.0 LOCK replay cache, use-after-free in network packet handling, rejection of oversized directory entries in fuse, and other kernel networking and filesystem issues. These fixes resolve high-severity security problems that could impact system stability and security.

This security update for the SUSE Linux Enterprise Kernel 5.14.21-150500.55.121 addresses multiple vulnerabilities including heap overflow, use-after-free, and improper handling of oversized directory entries. The update fixes five distinct security issues affecting kernel components such as NFSv4.0, network packet handling, FUSE filesystem, and generic receive offload (GRO). These vulnerabilities are rated high severity and have been resolved by the SUSE Product Security Team in this patch.

In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks whether the dirent fits in the remaining space of the current page and advances to a fresh page if not. It never checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that cannot fit in a single page before copying them into the readdir cache.

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