net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute 漏洞信息(CVE-2025-21653)

一、漏洞 CVE-2025-21653 基础信息

漏洞标题

net_sched: cls_flow: 验证TCA_FLOW_RSHIFT属性

来源：AIGC 神龙大模型

漏洞描述信息

N/A

来源：AIGC 神龙大模型

CVSS信息

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

来源：AIGC 神龙大模型

漏洞类别

对数组索引的验证不恰当

来源：AIGC 神龙大模型

漏洞标题

net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute

来源：美国国家漏洞数据库 NVD

漏洞描述信息

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: <TASK> __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

来源：美国国家漏洞数据库 NVD

CVSS信息

N/A

来源：美国国家漏洞数据库 NVD

漏洞类别

N/A

来源：美国国家漏洞数据库 NVD

漏洞标题

Linux kernel 安全漏洞

来源：中国国家信息安全漏洞库 CNNVD

漏洞描述信息

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于cls_flow模块未验证TCA_FLOW_RSHIFT属性，可能导致移位操作超出范围。

来源：中国国家信息安全漏洞库 CNNVD

CVSS信息

N/A

来源：中国国家信息安全漏洞库 CNNVD

漏洞类别

其他

来源：中国国家信息安全漏洞库 CNNVD

二、漏洞 CVE-2025-21653 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2025-21653 的情报信息

标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2025-21653