{"id":69499,"date":"2025-09-04T21:32:00","date_gmt":"2025-09-04T18:02:00","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-38730-io_uring-net-commit-partial-buffers-on-retry\/"},"modified":"2025-09-04T21:32:00","modified_gmt":"2025-09-04T18:02:00","slug":"cve-2025-38730-io_uring-net-commit-partial-buffers-on-retry","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-38730-io_uring-net-commit-partial-buffers-on-retry\/","title":{"rendered":"CVE-2025-38730 &#8211; io_uring\/net: commit partial buffers on retry"},"content":{"rendered":"<p><strong>CVE ID : <\/strong>CVE-2025-38730<br \/>\n<br \/>\n<strong>Published : <\/strong> Sept. 4, 2025, 4:15 p.m. | 56\u00a0minutes ago<br \/>\n<br \/>\n<strong>Description : <\/strong>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>io_uring\/net: commit partial buffers on retry<\/p>\n<p>Ring provided buffers are potentially only valid within the single<br \/>\nexecution context in which they were acquired. io_uring deals with this<br \/>\nand invalidates them on retry. But on the networking side, if<br \/>\nMSG_WAITALL is set, or if the socket is of the streaming type and too<br \/>\nlittle was processed, then it will hang on to the buffer rather than<br \/>\nrecycle or commit it. This is problematic for two reasons:<\/p>\n<p>1) If someone unregisters the provided buffer ring before a later retry,<br \/>\n   then the req-&gt;buf_list will no longer be valid.<\/p>\n<p>2) If multiple sockers are using the same buffer group, then multiple<br \/>\n   receives can consume the same memory. This can cause data corruption<br \/>\n   in the application, as either receive could land in the same<br \/>\n   userspace buffer.<\/p>\n<p>Fix this by disallowing partial retries from pinning a provided buffer<br \/>\nacross multiple executions, if ring provided buffers are used.<br \/>\n<br \/>\n<strong>Severity:<\/strong> 0.0 | NA<br \/>\n<br \/>\nVisit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-38730 Published : Sept. 4, 2025, 4:15 p.m. | 56\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: io_uring\/net: commit partial buffers on retry Ring provided buffers are potentially only valid within the single execution context in which they were acquired. io_uring deals with this and invalidates &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-69499","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/69499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=69499"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/69499\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=69499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=69499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=69499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}