{"id":21335,"date":"2026-09-12T04:31:03","date_gmt":"2026-09-11T20:31:03","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-81002"},"modified":"2026-09-12T04:31:03","modified_gmt":"2026-09-11T20:31:03","slug":"cve-2026-81002","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-81002","title":{"rendered":"CVE-2026-81002 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxdp: fix zero-copy fr"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xdp: fix zero-copy frame layout<\/p>\n<p>xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page<br \/>\nand advertises PAGE_SIZE as its frame size.  It allows the copied frame<br \/>\nto occupy the page tail needed by skb_shared_info and records zero<br \/>\nheadroom even when metadata separates the frame header from packet data.<br \/>\nAn AF_XDP zero-copy packet redirected through cpumap can therefore make<br \/>\nthe skb overlap skb_shared_info or place it beyond the allocated page.<\/p>\n<p>Limit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the<br \/>\nmetadata length in frame headroom.  Redirect callers already handle a<br \/>\nNULL conversion result.<\/p>\n<p>BUG: KASAN: slab-out-of-bounds in skb_gro_receive<br \/>\nWrite of size 4 at addr ffff88800cf37004 by task cpumap\/1\/map:1\/146<br \/>\nCall Trace:<br \/>\n skb_gro_receive (net\/core\/gro.c:174)<br \/>\n udp_gro_receive (net\/ipv4\/udp_offload.c:812)<br \/>\n inet_gro_receive (net\/ipv4\/af_inet.c:1539)<br \/>\n dev_gro_receive (net\/core\/gro.c:515)<br \/>\n gro_receive_skb (net\/core\/gro.c:633)<br \/>\n cpu_map_kthread_run (kernel\/bpf\/cpumap.c:395)<br \/>\n kthread (kernel\/kthread.c:436)<br \/>\n ret_from_fork (arch\/x86\/kernel\/process.c:164)<br \/>\n ret_from_fork_asm (arch\/x86\/entry\/entry_64.S:255)<br \/>\nKernel panic &#8211; not syncing: KASAN: panic_on_warn set &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xdp: fix zero-copy frame layout<\/p>\n<p>xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page<br \/>\nand advertises PAGE_SIZE a<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21335","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21335","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=21335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}