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CVE-2026-45970— 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，该漏洞源于在绑定接口上下电期间rlb_arp_recv存在释放后重用，可能导致空指针解引用。

CVSS 7.8 · High EPSS 0.13% · P3

影响版本矩阵 18

厂商产品 版本范围状态
Linux Linux 3aba891dde3842d89ad022237b99c1ed308040b0< fd54ddc929be1d6c3b3b7b35d6d4642a5d9e803c affected
3aba891dde3842d89ad022237b99c1ed308040b0< de7c097800f07f3c108185c7a38b53a530ba30ff affected
3aba891dde3842d89ad022237b99c1ed308040b0< db5435b5342e3aaa4521d0f3ccfe94316b253ca1 affected
3aba891dde3842d89ad022237b99c1ed308040b0< f94a0de7b9f32745a14a1621c63087a092823587 affected
3aba891dde3842d89ad022237b99c1ed308040b0< c65cdf46ce340c9c00fbbaf84599d2daff43626e affected
3aba891dde3842d89ad022237b99c1ed308040b0< fef13c403be3fb685cb06419e6b3623106aab5ba affected
3aba891dde3842d89ad022237b99c1ed308040b0< d31065526f160ee0244a719230aa069daca2bf4d affected
3aba891dde3842d89ad022237b99c1ed308040b0< e6834a4c474697df23ab9948fd3577b26bf48656 affected
… +10 条更多
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一、 漏洞 CVE-2026-45970 基础信息

漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
bonding: alb: fix UAF in rlb_arp_recv during bond up/down
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix UAF in rlb_arp_recv during bond up/down The ALB RX path may access rx_hashtbl concurrently with bond teardown. During rapid bond up/down cycles, rlb_deinitialize() frees rx_hashtbl while RX handlers are still running, leading to a null pointer dereference detected by KASAN. However, the root cause is that rlb_arp_recv() can still be accessed after setting recv_probe to NULL, which is actually a use-after-free (UAF) issue. That is the reason for using the referenced commit in the Fixes tag. [ 214.174138] Oops: general protection fault, probably for non-canonical address 0xdffffc000000001d: 0000 [#1] SMP KASAN PTI [ 214.186478] KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef] [ 214.194933] CPU: 30 UID: 0 PID: 2375 Comm: ping Kdump: loaded Not tainted 6.19.0-rc8+ #2 PREEMPT(voluntary) [ 214.205907] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.14.0 01/14/2022 [ 214.214357] RIP: 0010:rlb_arp_recv+0x505/0xab0 [bonding] [ 214.220320] Code: 0f 85 2b 05 00 00 48 b8 00 00 00 00 00 fc ff df 40 0f b6 ed 48 c1 e5 06 49 03 ad 78 01 00 00 48 8d 7d 28 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 12 05 00 00 80 7d 28 00 0f 84 8c 00 [ 214.241280] RSP: 0018:ffffc900073d8870 EFLAGS: 00010206 [ 214.247116] RAX: dffffc0000000000 RBX: ffff888168556822 RCX: ffff88816855681e [ 214.255082] RDX: 000000000000001d RSI: dffffc0000000000 RDI: 00000000000000e8 [ 214.263048] RBP: 00000000000000c0 R08: 0000000000000002 R09: ffffed11192021c8 [ 214.271013] R10: ffff8888c9010e43 R11: 0000000000000001 R12: 1ffff92000e7b119 [ 214.278978] R13: ffff8888c9010e00 R14: ffff888168556822 R15: ffff888168556810 [ 214.286943] FS: 00007f85d2d9cb80(0000) GS:ffff88886ccb3000(0000) knlGS:0000000000000000 [ 214.295966] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 214.302380] CR2: 00007f0d047b5e34 CR3: 00000008a1c2e002 CR4: 00000000001726f0 [ 214.310347] Call Trace: [ 214.313070] <IRQ> [ 214.315318] ? __pfx_rlb_arp_recv+0x10/0x10 [bonding] [ 214.320975] bond_handle_frame+0x166/0xb60 [bonding] [ 214.326537] ? __pfx_bond_handle_frame+0x10/0x10 [bonding] [ 214.332680] __netif_receive_skb_core.constprop.0+0x576/0x2710 [ 214.339199] ? __pfx_arp_process+0x10/0x10 [ 214.343775] ? sched_balance_find_src_group+0x98/0x630 [ 214.349513] ? __pfx___netif_receive_skb_core.constprop.0+0x10/0x10 [ 214.356513] ? arp_rcv+0x307/0x690 [ 214.360311] ? __pfx_arp_rcv+0x10/0x10 [ 214.364499] ? __lock_acquire+0x58c/0xbd0 [ 214.368975] __netif_receive_skb_one_core+0xae/0x1b0 [ 214.374518] ? __pfx___netif_receive_skb_one_core+0x10/0x10 [ 214.380743] ? lock_acquire+0x10b/0x140 [ 214.385026] process_backlog+0x3f1/0x13a0 [ 214.389502] ? process_backlog+0x3aa/0x13a0 [ 214.394174] __napi_poll.constprop.0+0x9f/0x370 [ 214.399233] net_rx_action+0x8c1/0xe60 [ 214.403423] ? __pfx_net_rx_action+0x10/0x10 [ 214.408193] ? lock_acquire.part.0+0xbd/0x260 [ 214.413058] ? sched_clock_cpu+0x6c/0x540 [ 214.417540] ? mark_held_locks+0x40/0x70 [ 214.421920] handle_softirqs+0x1fd/0x860 [ 214.426302] ? __pfx_handle_softirqs+0x10/0x10 [ 214.431264] ? __neigh_event_send+0x2d6/0xf50 [ 214.436131] do_softirq+0xb1/0xf0 [ 214.439830] </IRQ> The issue is reproducible by repeatedly running ip link set bond0 up/down while receiving ARP messages, where rlb_arp_recv() can race with rlb_deinitialize() and dereference a freed rx_hashtbl entry. Fix this by setting recv_probe to NULL and then calling synchronize_net() to wait for any concurrent RX processing to finish. This ensures that no RX handler can access rx_hashtbl after it is freed in bond_alb_deinitialize().
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，该漏洞源于在绑定接口上下电期间rlb_arp_recv存在释放后重用，可能导致空指针解引用。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux 3aba891dde3842d89ad022237b99c1ed308040b0 ~ fd54ddc929be1d6c3b3b7b35d6d4642a5d9e803c -
Linux Linux 3.0 -

二、漏洞 CVE-2026-45970 的公开POC

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三、漏洞 CVE-2026-45970 的情报信息

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CVE-2026-45970 补丁与修复 (8)

同批安全公告 · Linux · 2026-05-27 · 共 275 条

CVE-2026-45898 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-46039 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-45988 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-45972 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-46043 9.1 CRITICAL Linux kernel 安全漏洞
CVE-2026-45945 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-46056 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-45843 8.2 HIGH Linux kernel 安全漏洞
CVE-2026-46037 8.2 HIGH Linux kernel 安全漏洞
CVE-2025-71311 8.2 HIGH Linux kernel 安全漏洞
CVE-2026-46010 8.1 HIGH Linux kernel 安全漏洞
CVE-2026-46099 8.1 HIGH Linux kernel 安全漏洞
CVE-2026-46076 7.9 HIGH Linux kernel 安全漏洞
CVE-2026-45933 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-45959 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-45935 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-45984 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-46006 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-45862 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-45861 7.8 HIGH Linux kernel 安全漏洞

显示前 20 条，共 275 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45970

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