{"id":63699,"date":"2025-05-26T19:31:50","date_gmt":"2025-05-26T16:01:50","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-37992-linux-kernel-net_sched-null-pointer-dereference-vulnerability\/"},"modified":"2025-05-26T19:31:50","modified_gmt":"2025-05-26T16:01:50","slug":"cve-2025-37992-linux-kernel-net_sched-null-pointer-dereference-vulnerability","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-37992-linux-kernel-net_sched-null-pointer-dereference-vulnerability\/","title":{"rendered":"CVE-2025-37992 &#8211; Linux Kernel net_sched NULL Pointer Dereference Vulnerability"},"content":{"rendered":"<p><strong>CVE ID : <\/strong>CVE-2025-37992<br \/>\n<br \/>\n<strong>Published : <\/strong> May 26, 2025, 3:15 p.m. | 16\u00a0minutes ago<br \/>\n<br \/>\n<strong>Description : <\/strong>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net_sched: Flush gso_skb list too during -&gt;change()<\/p>\n<p>Previously, when reducing a qdisc&#8217;s limit via the -&gt;change() operation, only<br \/>\nthe main skb queue was trimmed, potentially leaving packets in the gso_skb<br \/>\nlist. This could result in NULL pointer dereference when we only check<br \/>\nsch-&gt;limit against sch-&gt;q.qlen.<\/p>\n<p>This patch introduces a new helper, qdisc_dequeue_internal(), which ensures<br \/>\nboth the gso_skb list and the main queue are properly flushed when trimming<br \/>\nexcess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie)<br \/>\nare updated to use this helper in their -&gt;change() routines.<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-2025-37992 Published : May 26, 2025, 3:15 p.m. | 16\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during -&gt;change() Previously, when reducing a qdisc&#8217;s limit via the -&gt;change() operation, only the main skb queue was trimmed, potentially leaving packets in the &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-63699","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/63699","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=63699"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/63699\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=63699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=63699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=63699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}