CVE-2026-46094

About vulnerability

In the Linux kernel, the following vulnerability has been resolved: ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access The bounds check for the next xattr entry in check_xattrs() uses (void *)next >= end, which allows next to point within sizeof(u32) bytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4 bytes via *(__u32 *)(entry), which can overrun the valid xattr region. For example, if next lands at end - 1, the check passes since next < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1, accessing 3 bytes beyond the valid region. Fix this by changing the check to (void *)next + sizeof(u32) > end, ensuring there is always enough space for the IS_LAST_ENTRY() read on the subsequent iteration. A flaw was found in the Linux kernel’s ext4 filesystem, specifically in the check_xattrs() function. A local attacker could exploit a bounds check error, allowing an out-of-bounds read when processing extended attributes (xattrs). This could lead to memory corruption, potentially causing a denial of service or information disclosure.

Live-patch status from KernelCare for each operating system.