{"id":"CVE-2026-46281","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nvmalloc: fix buffer overflow in vrealloc_node_align()\n\nCommit 4c5d3365882d (\"mm/vmalloc: allow to set node and align in\nvrealloc\") added the ability to force a new allo…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvmalloc: fix buffer overflow in vrealloc_node_align()\n\nCommit 4c5d3365882d (\"mm/vmalloc: allow to set node and align in\nvrealloc\") added the ability to force a new allo…","severity":"none","published":"2026-06-08","updated":"2026-07-07","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46281","references":[{"url":"https://git.kernel.org/stable/c/82d1f01292d3f09bf063f829f8ab8de12b4280a1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b281adf71f786c325eb6d6d1582d4d05313438a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e9b057a44deff4c59c13f44672a5cc74dcd57522","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.0014,"epssPercentile":0.03767,"ingestedAt":"2026-07-07T18:42:24.272Z","slug":"CVE-2026-46281","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvmalloc: fix buffer overflow in vrealloc_node_align()\n\nCommit 4c5d3365882d (\"mm/vmalloc: allow to set node and align in\nvrealloc\") added the ability to force a new allocation if the current\npointer is on the wrong NUMA node, or if an alignment constraint is not\nmet, even if the user is shrinking the allocation.\n\nOn this path (need_realloc), the code allocates a new object of 'size'\nbytes and then memcpy()s 'old_size' bytes into it.  If the request is to\nshrink the object (size < old_size), this results in an out-of-bounds\nwrite on the new buffer.\n\nFix this by bounding the copy length by the new allocation size.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}