{"id":41322,"date":"2026-10-19T00:33:13","date_gmt":"2026-10-18T16:33:13","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98850"},"modified":"2026-10-19T00:33:13","modified_gmt":"2026-10-18T16:33:13","slug":"cve-2026-98850","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98850","title":{"rendered":"CVE-2026-98850 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet\/packet: prevent T"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/packet: prevent TX_RING byte count overflow<\/p>\n<p>tpacket_snd() drains every SEND_REQUEST frame in a TX ring and adds<br \/>\neach valid packet length to the signed int len_sum. Userspace can<br \/>\nrecycle completed frames concurrently, so a single blocking send call<br \/>\nis not bounded by the ring size.<\/p>\n<p>After enough successful transmissions len_sum wraps into the negative<br \/>\nrange. In particular, 65536 65535-byte frames followed by a 65007-byte<br \/>\nframe produce 0xfffffdef, or -EIOCBQUEUED. sock_sendmsg_nosec() treats<br \/>\nthat as an impossible return and triggers a BUG. On systems configured<br \/>\nto panic on oops, a CAP_NET_RAW holder can panic the host kernel.<\/p>\n<p>Stop before the next frame would make the byte count exceed INT_MAX.<br \/>\nThe positive short count leaves that frame pending for a later send<br \/>\ncall.<\/p>\n<p>A two-thread TPACKET_V2 reproducer triggered the BUG on an arm64 build<br \/>\nof Linux 7.3-rc4. With this change, the same reproducer returned the<br \/>\nexpected positive short count without an oops.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/packet: prevent TX_RING byte count overflow<\/p>\n<p>tpacket_snd() drains every SEND_REQUEST frame in a TX ring and adds<br \/>\neach valid pac<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41322","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41322","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}