CVE ID : CVE-2025-40004<\/p>\n
Published : Oct. 20, 2025, 6:15 a.m. | 26\u00a0minutes ago<\/p>\n
Description : In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/9p: Fix buffer overflow in USB transport layer<\/p>\n
A buffer overflow vulnerability exists in the USB 9pfs transport layer
\nwhere inconsistent size validation between packet header parsing and
\nactual data copying allows a malicious USB host to overflow heap buffers.<\/p>\n
The issue occurs because:
\n– usb9pfs_rx_header() validates only the declared size in packet header
\n– usb9pfs_rx_complete() uses req->actual (actual received bytes) for
\nmemcpy<\/p>\n
This allows an attacker to craft packets with small declared size
\n(bypassing validation) but large actual payload (triggering overflow
\nin memcpy).<\/p>\n
Add validation in usb9pfs_rx_complete() to ensure req->actual does not
\nexceed the buffer capacity before copying data.<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID : CVE-2025-40004 Published : Oct. 20, 2025, 6:15 a.m. | 26\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: net\/9p: Fix buffer overflow in USB transport layer A buffer overflow vulnerability exists in the USB 9pfs transport layer where inconsistent size validation between packet header parsing and actual …<\/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-71975","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/71975","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=71975"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/71975\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=71975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=71975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=71975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}