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CVE-2026-43241— ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access

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ntb_hw_switchtec驱动中数组索引越界访问，可能导致无效配置时访问越界。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ec0467ccbdeb69a86c8729073057bda7bce00eec< 348e1ac9ad983ed7e62de14e1daf47f1695a4ce9 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< ee02c4f980c91820845dd8e469ec7dc670ab6d9d affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 740945de896021b9a859e71f38f6aea72a6393cf affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 0e930420945106151c6eb3d7837b4e6154e9b144 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 2346856b74823a2a78109002e479a3d02526a9ce affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 47ce292dd45dc689747c40603222691638919189 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface affected
… +10 more rows
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I. Basic Information for CVE-2026-43241

Vulnerability Information
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Vulnerability Title
ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.
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ntb_hw_switchtec驱动中数组索引越界访问，可能导致无效配置时访问越界。
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 ec0467ccbdeb69a86c8729073057bda7bce00eec ~ 348e1ac9ad983ed7e62de14e1daf47f1695a4ce9 -
Linux Linux 4.15 -

II. Public POCs for CVE-2026-43241

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III. Intelligence Information for CVE-2026-43241

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Patches & Fixes for CVE-2026-43241 (8)

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

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-2026-43125 9.8 CRITICAL dlm: validate length in dlm_search_rsb_tree
CVE-2026-43208 9.8 CRITICAL net: do not pass flow_id to set_rps_cpu()
CVE-2026-43198 9.8 CRITICAL tcp: fix potential race in tcp_v6_syn_recv_sock()
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-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields
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-2026-43187 8.8 HIGH xfs: delete attr leaf freemap entries when empty
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing

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-2026-43241

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