CVE-2026-31419— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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bond_xmit_broadcast函数存在释放后重用，可能导致双重释放和内核崩溃。
可能的 ATT&CK 技术 1 AI
T1055 · Process Injection影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 4e5bd03ae34652cd932ab4c91c71c511793df75c< 00752893f96b344f258c9c6de18b33171ac4872c |
affected |
4e5bd03ae34652cd932ab4c91c71c511793df75c< 2de5c8eea0a9db99dae7c36f4b541b74b41d3a04 |
affected | ||
4e5bd03ae34652cd932ab4c91c71c511793df75c< a0f661918edc79d7a75e468128af8d41e2a1a83a |
affected | ||
4e5bd03ae34652cd932ab4c91c71c511793df75c< d4cc7e4c80b1634c7b1497574a2fdb18df6c026c |
affected | ||
4e5bd03ae34652cd932ab4c91c71c511793df75c< f5b94654a4a19891a8108d66ef166de6c028c6cd |
affected | ||
4e5bd03ae34652cd932ab4c91c71c511793df75c< 2884bf72fb8f03409e423397319205de48adca16 |
affected | ||
20949c3816463e97c6f8fe84c0280c7e5ae83a8d |
affected | ||
f1d206181f19b00b275b258fea1418718a2f4173 |
affected | ||
| … +12 条更多 | |||
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一、 漏洞 CVE-2026-31419 基础信息
漏洞信息
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Vulnerability Title
net: bonding: fix use-after-free in bond_xmit_broadcast()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: bonding: fix use-after-free in bond_xmit_broadcast()
bond_xmit_broadcast() reuses the original skb for the last slave
(determined by bond_is_last_slave()) and clones it for others.
Concurrent slave enslave/release can mutate the slave list during
RCU-protected iteration, changing which slave is "last" mid-loop.
This causes the original skb to be double-consumed (double-freed).
Replace the racy bond_is_last_slave() check with a simple index
comparison (i + 1 == slaves_count) against the pre-snapshot slave
count taken via READ_ONCE() before the loop. This preserves the
zero-copy optimization for the last slave while making the "last"
determination stable against concurrent list mutations.
The UAF can trigger the following crash:
==================================================================
BUG: KASAN: slab-use-after-free in skb_clone
Read of size 8 at addr ffff888100ef8d40 by task exploit/147
CPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY
Call Trace:
<TASK>
dump_stack_lvl (lib/dump_stack.c:123)
print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)
kasan_report (mm/kasan/report.c:597)
skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108)
bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334)
bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593)
dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887)
__dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838)
ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136)
ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)
ip6_output (net/ipv6/ip6_output.c:250)
ip6_send_skb (net/ipv6/ip6_output.c:1985)
udp_v6_send_skb (net/ipv6/udp.c:1442)
udpv6_sendmsg (net/ipv6/udp.c:1733)
__sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206)
__x64_sys_sendto (net/socket.c:2209)
do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
</TASK>
Allocated by task 147:
Freed by task 147:
The buggy address belongs to the object at ffff888100ef8c80
which belongs to the cache skbuff_head_cache of size 224
The buggy address is located 192 bytes inside of
freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60)
Memory state around the buggy address:
ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
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bond_xmit_broadcast函数存在释放后重用，可能导致双重释放和内核崩溃。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-31419 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-31419 补丁与修复 (4)
同批安全公告 · Linux · 2026-04-13 · 共 15 条
| CVE-2026-31414 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31417 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31426 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31428 | Linux kernel 安全漏洞 | |
| CVE-2026-31427 | Linux kernel 安全漏洞 | |
| CVE-2026-31425 | Linux kernel 安全漏洞 | |
| CVE-2026-31424 | Linux kernel 安全漏洞 | |
| CVE-2026-31423 | Linux kernel 安全漏洞 | |
| CVE-2026-31422 | Linux kernel 安全漏洞 | |
| CVE-2026-31420 | Linux kernel 安全漏洞 | |
| CVE-2026-31421 | Linux kernel 安全漏洞 | |
| CVE-2026-31418 | Linux kernel 安全漏洞 | |
| CVE-2026-31416 | Linux kernel 安全漏洞 | |
| CVE-2026-31415 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-31419
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