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CVE-2026-43103— net: lapbether: handle NETDEV_PRE_TYPE_CHANGE

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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lapbeth_data_transmit函数期望底层设备类型为ARPHRD_ETHER，未处理NETDEV_PRE_TYPE_CHANGE事件可能导致绑定驱动破坏此期望。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 872254dd6b1f80cb95ee9e2e22980888533fc293< 698642a01d53107ce9b3fc08bd801284af478a2b affected
872254dd6b1f80cb95ee9e2e22980888533fc293< ffc5ed59f6dc87c51e8775f002619310225742e8 affected
872254dd6b1f80cb95ee9e2e22980888533fc293< a10570973619cba9dfa6d723177251b846fae587 affected
872254dd6b1f80cb95ee9e2e22980888533fc293< 363a38044b8cd5b496d241651a1fb666e7c5fe3e affected
872254dd6b1f80cb95ee9e2e22980888533fc293< 328bb2cff5c2ed973f595ded769e15f4b7a117be affected
872254dd6b1f80cb95ee9e2e22980888533fc293< 63851f60781aa89258c8f0952cd13940aab0888e affected
872254dd6b1f80cb95ee9e2e22980888533fc293< b117056768ab7deb434e7d72065e48d2083a0c2a affected
872254dd6b1f80cb95ee9e2e22980888533fc293< b120e4432f9f56c7103133d6a11245e617695adb affected
… +10 more rows
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I. Basic Information for CVE-2026-43103

Vulnerability Information
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Vulnerability Title
net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: lapbether: handle NETDEV_PRE_TYPE_CHANGE lapbeth_data_transmit() expects the underlying device type to be ARPHRD_ETHER. Returning NOTIFY_BAD from lapbeth_device_event() makes sure bonding driver can not break this expectation.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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lapbeth_data_transmit函数期望底层设备类型为ARPHRD_ETHER，未处理NETDEV_PRE_TYPE_CHANGE事件可能导致绑定驱动破坏此期望。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 872254dd6b1f80cb95ee9e2e22980888533fc293 ~ 698642a01d53107ce9b3fc08bd801284af478a2b -
Linux Linux 2.6.24 -

II. Public POCs for CVE-2026-43103

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III. Intelligence Information for CVE-2026-43103

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Patches & Fixes for CVE-2026-43103 (8)

Same Patch Batch · Linux · 2026-05-06 · 224 CVEs total

CVE-2026-43208 9.8 CRITICAL net: do not pass flow_id to set_rps_cpu()
CVE-2026-43125 9.8 CRITICAL dlm: validate length in dlm_search_rsb_tree
CVE-2026-43198 9.8 CRITICAL tcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-43186 9.8 CRITICAL ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-43185 9.8 CRITICAL ksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-43114 9.4 CRITICAL netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-43117 9.1 CRITICAL btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43239 8.8 HIGH smb: client: prevent races in ->query_interfaces()
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43187 8.8 HIGH xfs: delete attr leaf freemap entries when empty

Showing top 20 of 224 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43103

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