ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut

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Summary

CVECVE-2026-43141
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:31 UTC
Updated2026-05-13 20:52:24 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec d652ef399f131fcd5f8f34266167449ee7c9e5b3 git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec 5590cd04d6845c01a6bad985a491c58af6fb5389 git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec a11d03d116eef138a7249202bd772c8e61915aec git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec d0559d07afabfddaaded6a61a16154486b956764 git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec 2e4d5e8d86a969318340be95470bb76e52392082 git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec a133e3caf844a3f56b6eef89ddaa66115874f6bd git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec 1a867d0d79a4a570a33f2f433919ad2bd7a27b67 git Not specified
CNA Linux Linux affected ec0467ccbdeb69a86c8729073057bda7bce00eec 186615f8855a0be4ee7d3fcd09a8ecc10e783b08 git Not specified
CNA Linux Linux affected 4.15 Not specified
CNA Linux Linux unaffected 4.15 semver Not specified
CNA Linux Linux unaffected 5.10.252 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d0559d07afabfddaaded6a61a16154486b956764 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1a867d0d79a4a570a33f2f433919ad2bd7a27b67 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/186615f8855a0be4ee7d3fcd09a8ecc10e783b08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a11d03d116eef138a7249202bd772c8e61915aec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a133e3caf844a3f56b6eef89ddaa66115874f6bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d652ef399f131fcd5f8f34266167449ee7c9e5b3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5590cd04d6845c01a6bad985a491c58af6fb5389 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2e4d5e8d86a969318340be95470bb76e52392082 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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