ghsa-478m-w5gm-f3cr
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute
syzbot found that TCA_FLOW_RSHIFT attribute was not validated. Right shitfing a 32bit integer is undefined for large shift values.
UBSAN: shift-out-of-bounds in net/sched/cls_flow.c:329:23 shift exponent 9445 is too large for 32-bit type 'u32' (aka 'unsigned int') CPU: 1 UID: 0 PID: 54 Comm: kworker/u8:3 Not tainted 6.13.0-rc3-syzkaller-00180-g4f619d518db9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 flow_classify+0x24d5/0x25b0 net/sched/cls_flow.c:329 tc_classify include/net/tc_wrapper.h:197 [inline] __tcf_classify net/sched/cls_api.c:1771 [inline] tcf_classify+0x420/0x1160 net/sched/cls_api.c:1867 sfb_classify net/sched/sch_sfb.c:260 [inline] sfb_enqueue+0x3ad/0x18b0 net/sched/sch_sfb.c:318 dev_qdisc_enqueue+0x4b/0x290 net/core/dev.c:3793 __dev_xmit_skb net/core/dev.c:3889 [inline] __dev_queue_xmit+0xf0e/0x3f50 net/core/dev.c:4400 dev_queue_xmit include/linux/netdevice.h:3168 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236 iptunnel_xmit+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x262/0x3b0 net/ipv4/udp_tunnel_core.c:173 geneve_xmit_skb drivers/net/geneve.c:916 [inline] geneve_xmit+0x21dc/0x2d00 drivers/net/geneve.c:1039 __netdev_start_xmit include/linux/netdevice.h:5002 [inline] netdev_start_xmit include/linux/netdevice.h:5011 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3606 __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434
{
"affected": [],
"aliases": [
"CVE-2025-21653"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-19T11:15:10Z",
"severity": null
},
"details": "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 \u0027u32\u0027 (aka \u0027unsigned int\u0027)\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 \u003cTASK\u003e\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",
"id": "GHSA-478m-w5gm-f3cr",
"modified": "2025-02-02T12:30:24Z",
"published": "2025-01-19T12:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21653"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2011749ca96460386844dfc7e0fde53ebee96f3c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/43658e4a5f2770ad94e93362885ff51c10cf3179"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6fde663f7321418996645ee602a473457640542f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9858f4afeb2e59506e714176bd3e135539a3eeec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a039e54397c6a75b713b9ce7894a62e06956aa92"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a313d6e6d5f3a631cae5a241c392c28868aa5c5e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e54beb9aed2a90dddf4c5d68fcfc9a01f3e40a61"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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