{"uuid": "b6dd1b76-ee86-480f-9fa0-6a4e432e913d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21653", "type": "seen", "source": "https://t.me/cvedetector/15843", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-21653 - Linux Kernel net_sched cls_flow TCA_FLOW_RSHIFT Out-of-Bounds Shift Discipline Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2025-21653 \nPublished : Jan. 19, 2025, 11:15 a.m. | 45\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nnet_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute  \n  \nsyzbot found that TCA_FLOW_RSHIFT attribute was not validated.  \nRight shitfing a 32bit integer is undefined for large shift values.  \n  \nUBSAN: shift-out-of-bounds in net/sched/cls_flow.c:329:23  \nshift exponent 9445 is too large for 32-bit type 'u32' (aka 'unsigned int')  \nCPU: 1 UID: 0 PID: 54 Comm: kworker/u8:3 Not tainted 6.13.0-rc3-syzkaller-00180-g4f619d518db9 #0  \nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024  \nWorkqueue: ipv6_addrconf addrconf_dad_work  \nCall Trace:  \n   \n  __dump_stack lib/dump_stack.c:94 [inline]  \n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120  \n  ubsan_epilogue lib/ubsan.c:231 [inline]  \n  __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468  \n  flow_classify+0x24d5/0x25b0 net/sched/cls_flow.c:329  \n  tc_classify include/net/tc_wrapper.h:197 [inline]  \n  __tcf_classify net/sched/cls_api.c:1771 [inline]  \n  tcf_classify+0x420/0x1160 net/sched/cls_api.c:1867  \n  sfb_classify net/sched/sch_sfb.c:260 [inline]  \n  sfb_enqueue+0x3ad/0x18b0 net/sched/sch_sfb.c:318  \n  dev_qdisc_enqueue+0x4b/0x290 net/core/dev.c:3793  \n  __dev_xmit_skb net/core/dev.c:3889 [inline]  \n  __dev_queue_xmit+0xf0e/0x3f50 net/core/dev.c:4400  \n  dev_queue_xmit include/linux/netdevice.h:3168 [inline]  \n  neigh_hh_output include/net/neighbour.h:523 [inline]  \n  neigh_output include/net/neighbour.h:537 [inline]  \n  ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236  \n  iptunnel_xmit+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82  \n  udp_tunnel_xmit_skb+0x262/0x3b0 net/ipv4/udp_tunnel_core.c:173  \n  geneve_xmit_skb drivers/net/geneve.c:916 [inline]  \n  geneve_xmit+0x21dc/0x2d00 drivers/net/geneve.c:1039  \n  __netdev_start_xmit include/linux/netdevice.h:5002 [inline]  \n  netdev_start_xmit include/linux/netdevice.h:5011 [inline]  \n  xmit_one net/core/dev.c:3590 [inline]  \n  dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3606  \n  __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434 \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"19 Jan 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-01-19T13:08:08.000000Z"}