Description
In the Linux kernel, the following vulnerability has been resolved: vmalloc: fix buffer overflow in vrealloc_node_align() Commit 4c5d3365882d ("mm/vmalloc: allow to set node and align in vrealloc") added the ability to force a new allocation if the current pointer is on the wrong NUMA node, or if an alignment constraint is not met, even if the user is shrinking the allocation. On this path (need_realloc), the code allocates a new object of 'size' bytes and then memcpy()s 'old_size' bytes into it. If the request is to shrink the object (size < old_size), this results in an out-of-bounds write on the new buffer. Fix this by bounding the copy length by the new allocation size.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4c5d3365882dbbc0784688784904f440d7a4c0f1 to < e9b057a44deff4c59c13f44672a5cc74dcd57522affected4c5d3365882dbbc0784688784904f440d7a4c0f1 to < b281adf71f786c325eb6d6d1582d4d05313438a8affected4c5d3365882dbbc0784688784904f440d7a4c0f1 to < 82d1f01292d3f09bf063f829f8ab8de12b4280a1affected
Linux Linux
Default version status: affected
6.18affected0 to < 6.18unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected