[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"cve-CVE-2026-80852":3},{"id":4,"cve_id":5,"euvd_id":6,"summary":7,"published":8,"cvss_data":9,"is_remote":10,"cwes":11,"cpes":12,"technologies":13,"references":14,"score":22,"epss_score":23,"epss_percentile":24,"is_kev":10,"cisa_kev_date_added":25,"cisa_kev_due_date":25,"cisa_ssvc":26,"attack_mappings":32,"exploits":33},385240,"CVE-2026-80852","EUVD-2026-71302","In the Linux kernel, the following vulnerability has been resolved:\n\ntls: device: fix out-of-bounds write in tls_append_frag()\n\nFound with syzkaller and a local syzbot instance running on top of a\nnetdevsim TLS offload emulation; tls_device.c is otherwise only reachable\non a machine with a NIC that implements the offload.\n\ntls_push_data() only checks whether the open record still has room for\nanother frag at the bottom of its loop, and the MSG_MORE early break\nskips that check.  The record survives to the next syscall with the frag\ncount it already had, and tls_append_frag() does not check either, so\nwith TLS_TX_ZEROCOPY_RO every splice(SPLICE_F_MORE) of a byte or two adds\na non-coalescing pipe page and num_frags walks off the end of\ntls_record_info.frags[MAX_SKB_FRAGS].  Once the record is pushed,\ntls_push_record() runs the same index over sg_tx_data[MAX_SKB_FRAGS] and\nthe sg_set_page() writes land on the destruct_work that follows it, which\nthe workqueue then calls.\n\nThe byte limit is fine because copy drops to 0 and the loop falls through\nto the same check; the frag count has no such feedback.\n\nPush the record rather than keep a full one open, which is what a plain\nTCP socket does - tcp_sendmsg_locked() uses tcp_mark_push() and\nnew_segment in both the copy and the MSG_SPLICE_PAGES paths, and tls_sw\nalready sets full_record when the sk_msg ring fills up, MSG_MORE or not.\n\n  BUG: KASAN: slab-out-of-bounds in tls_append_frag ( net\u002Ftls\u002Ftls_device.c:269)\n  Write of size 8 at addr ffff8881104d1530 by task tls_oob\u002F450\n\n  CPU: 2 UID: 0 PID: 450 Comm: tls_oob Not tainted 7.2.0-rc7+ #329 PREEMPT\n  Call Trace:\n   \u003CTASK>\n   dump_stack_lvl (lib\u002Fdump_stack.c:94 lib\u002Fdump_stack.c:120)\n   print_report (mm\u002Fkasan\u002Freport.c:378 mm\u002Fkasan\u002Freport.c:482)\n   kasan_report (mm\u002Fkasan\u002Freport.c:595)\n   tls_append_frag (net\u002Ftls\u002Ftls_device.c:269)\n   tls_push_data (net\u002Ftls\u002Ftls_device.c:518)\n   tls_device_sendmsg (net\u002Ftls\u002Ftls_device.c:583)\n   inet_sendmsg (net\u002Fipv4\u002Faf_inet.c:865)\n   sock_sendmsg (net\u002Fsocket.c:775 net\u002Fsocket.c:790 net\u002Fsocket.c:813)\n   splice_to_socket (fs\u002Fsplice.c:884)\n   do_splice (fs\u002Fsplice.c:936 fs\u002Fsplice.c:1349)\n   __do_splice (fs\u002Fsplice.c:1431)\n   __x64_sys_splice (fs\u002Fsplice.c:1634 fs\u002Fsplice.c:1616)\n   do_syscall_64 (arch\u002Fx86\u002Fentry\u002Fsyscall_64.c:63 arch\u002Fx86\u002Fentry\u002Fsyscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch\u002Fx86\u002Fentry\u002Fentry_64.S:121)\n   \u003C\u002FTASK>\n\nand, once the record is pushed:\n\n  UBSAN: array-index-out-of-bounds in net\u002Ftls\u002Ftls_device.c:300:24\n  index 18 is out of range for type 'skb_frag_t [17]'\n  UBSAN: array-index-out-of-bounds in net\u002Ftls\u002Ftls_device.c:301:41\n  index 18 is out of range for type 'scatterlist [17]'\n  UBSAN: array-index-out-of-bounds in net\u002Ftls\u002Ftls_device.c:302:39\n  index 18 is out of range for type 'scatterlist [17]'\n  UBSAN: array-index-out-of-bounds in net\u002Ftls\u002Ftls_device.c:307:38\n  index 26 is out of range for type 'scatterlist [17]'\n\n  kernel tried to execute NX-protected page - exploit attempt? (uid: 0)\n  BUG: unable to handle page fault for address: ffffea000411a680\n  #PF: supervisor instruction fetch in kernel mode\n  #PF: error_code(0x0011) - permissions violation\n  Oops: Oops: 0011 [#1] SMP KASAN PTI\n  Workqueue: ktls_device_destruct 0xffffea000411a680\n  RIP: 0010:0xffffea000411a680\n  Call Trace:\n   \u003CTASK>\n   worker_thread (kernel\u002Fworkqueue.c:3405 kernel\u002Fworkqueue.c:3486)\n   kthread (kernel\u002Fkthread.c:436)\n   ret_from_fork (arch\u002Fx86\u002Fkernel\u002Fprocess.c:158)\n   ret_from_fork_asm (arch\u002Fx86\u002Fentry\u002Fentry_64.S:245)\n   \u003C\u002FTASK>","2026-09-04T16:18:00Z",{},false,[],[],[],[15,16,17,18,19,20,21],"https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002F03ced5da6120965d80ed56dbb7d78fa5c9128906","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002F7e1208c135618358da5d7d6664874dc6e53c62fc","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fa832d7cb09da2a8e4e9734b4be14d3e76169d805","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fb17cf742eaad70ae29ac558cefb3aa9bbeea03d4","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fb7f10d4ff987bda038df90052cd4a1434a7412d4","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fcd7e875b89597f3498917af764758391338d1802","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Ffadbc1ed2a872a8649a44cf9e1cf9621fc58cd6e",0,0.00161,0.05225,null,{"timestamp":25,"automatable":27,"tech_impact":28,"exploitation":29,"cisa_decision":30,"cisa_remediation_timeline":31},"no","partial","none",{},"FSU",[],[]]