{"cve":"CVE-2026-46281","nvd":{"published":"2026-06-08T17:16:45.817","modified":"2026-07-23T08:10:00.137","status":"Analyzed","description":"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 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/82d1f01292d3f09bf063f829f8ab8de12b4280a1","https://git.kernel.org/stable/c/b281adf71f786c325eb6d6d1582d4d05313438a8","https://git.kernel.org/stable/c/e9b057a44deff4c59c13f44672a5cc74dcd57522"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-46281","score":0.0014,"percentile":0.03374,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}