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CVE-2026-43141— ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut

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驱动中当MW LUT数量为零时rounddown_pow_of_two函数导致移位越界。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ec0467ccbdeb69a86c8729073057bda7bce00eec< d652ef399f131fcd5f8f34266167449ee7c9e5b3 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 5590cd04d6845c01a6bad985a491c58af6fb5389 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< a11d03d116eef138a7249202bd772c8e61915aec affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< d0559d07afabfddaaded6a61a16154486b956764 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 2e4d5e8d86a969318340be95470bb76e52392082 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< a133e3caf844a3f56b6eef89ddaa66115874f6bd affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 1a867d0d79a4a570a33f2f433919ad2bd7a27b67 affected
ec0467ccbdeb69a86c8729073057bda7bce00eec< 186615f8855a0be4ee7d3fcd09a8ecc10e783b08 affected
… +10 more rows
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I. Basic Information for CVE-2026-43141

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut Number of MW LUTs depends on NTB configuration and can be set to zero, in such scenario rounddown_pow_of_two will cause undefined behaviour and should not be performed. This patch ensures that rounddown_pow_of_two is called on valid value.
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驱动中当MW LUT数量为零时rounddown_pow_of_two函数导致移位越界。
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 ~ d652ef399f131fcd5f8f34266167449ee7c9e5b3 -
Linux Linux 4.15 -

II. Public POCs for CVE-2026-43141

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III. Intelligence Information for CVE-2026-43141

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Patches & Fixes for CVE-2026-43141 (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-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
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-2026-43239 8.8 HIGH smb: client: prevent races in ->query_interfaces()
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing
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-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events

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-2026-43141

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