DEBIAN-CVE-2026-89779

In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: validate ef->size covers the record's name and value  When an EA record has a non-zero ef->size, ntfsreadea() only checks that the record fits in the remaining buffer (easize > bytes), not that ef->size is large enough to hold the record's own namelen + 1 + elength.  A crafted image can pass validation with, e.g., ef->size = 24 but elength = 0xffff. ntfsgetea() then trusts elength and copies it out of the undersized record, reading past the kmalloc(info->size) allocation and leaking heap memory to userspace via getxattr():   BUG: KASAN: slab-out-of-bounds in ntfsgetea (fs/ntfs3/xattr.c:302)  Read of size 65535 at addr ffff888100794550 by task exploit   asanmemcpy (mm/kasan/shadow.c:105)   ntfsgetea (fs/ntfs3/xattr.c:302)   ntfsgetxattr (fs/ntfs3/xattr.c:848)   vfsgetxattr (fs/xattr.c:441)   vfsgetxattr (fs/xattr.c:474)   dogetxattr (fs/xattr.c:800)   pathgetxattrat (fs/xattr.c:868)   dosyscall64 (arch/x86/entry/syscall_64.c:94)   The buggy address is located 80 bytes inside of   allocated 84-byte region in cache kmalloc-96  Compute the size the record needs and require ef->size to cover it.