{"id":65326,"date":"2025-06-30T12:32:11","date_gmt":"2025-06-30T09:02:11","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-38089-sunrpc-authentication-error-handling-remote-crash-vulnerability\/"},"modified":"2025-06-30T12:32:11","modified_gmt":"2025-06-30T09:02:11","slug":"cve-2025-38089-sunrpc-authentication-error-handling-remote-crash-vulnerability","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-38089-sunrpc-authentication-error-handling-remote-crash-vulnerability\/","title":{"rendered":"CVE-2025-38089 &#8211; SunRPC Authentication Error Handling Remote Crash Vulnerability"},"content":{"rendered":"<p><strong>CVE ID : <\/strong>CVE-2025-38089<br \/>\n<br \/>\n<strong>Published : <\/strong> June 30, 2025, 8:15 a.m. | 43\u00a0minutes ago<br \/>\n<br \/>\n<strong>Description : <\/strong>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sunrpc: handle SVC_GARBAGE during svc auth processing as auth error<\/p>\n<p>tianshuo han reported a remotely-triggerable crash if the client sends a<br \/>\nkernel RPC server a specially crafted packet. If decoding the RPC reply<br \/>\nfails in such a way that SVC_GARBAGE is returned without setting the<br \/>\nrq_accept_statp pointer, then that pointer can be dereferenced and a<br \/>\nvalue stored there.<\/p>\n<p>If it&#8217;s the first time the thread has processed an RPC, then that<br \/>\npointer will be set to NULL and the kernel will crash. In other cases,<br \/>\nit could create a memory scribble.<\/p>\n<p>The server sunrpc code treats a SVC_GARBAGE return from svc_authenticate<br \/>\nor pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531<br \/>\nsays that if authentication fails that the RPC should be rejected<br \/>\ninstead with a status of AUTH_ERR.<\/p>\n<p>Handle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of<br \/>\nAUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This<br \/>\nsidesteps the whole problem of touching the rpc_accept_statp pointer in<br \/>\nthis situation and avoids the crash.<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-2025-38089 Published : June 30, 2025, 8:15 a.m. | 43\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: sunrpc: handle SVC_GARBAGE during svc auth processing as auth error tianshuo han reported a remotely-triggerable crash if the client sends a kernel RPC server a specially crafted packet. If &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-65326","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/65326","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=65326"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/65326\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=65326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=65326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=65326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}