net: dsa: sja1105: flower: reject cross-chip redirect

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Summary

CVECVE-2026-97435
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 17:17:21 UTC
Updated2026-09-25 13:17:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: dsa: sja1105: flower: reject cross-chip redirect dsa_port_from_netdev() may return a valid port from a different switch chip. Programming another chip's port index into the local hardware causes redirection to the wrong port, or an out-of-bounds access if the index exceeds the local chip's port count. Apply a minimal fix that adds a check to catch this case and adjusts the extack message. When cls->common.skip_sw is not set, the operation could instead redirect to the upstream port and let the software or upstream switch(es) handle the forward, but that is not addressed here.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.051820000 (date 2026-09-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected dfacc5a23e227cabdff41b6202f510398e90d36b c999cc39775381b68ed66eae57c1425452672c0f git Not specified
CNA Linux Linux affected dfacc5a23e227cabdff41b6202f510398e90d36b abd7511e12b231798332afa04ed9bee9e84f9445 git Not specified
CNA Linux Linux affected dfacc5a23e227cabdff41b6202f510398e90d36b cfa5274a5dc2a23b957da5dc806d2ac0c7a66af0 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c999cc39775381b68ed66eae57c1425452672c0f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/abd7511e12b231798332afa04ed9bee9e84f9445 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cfa5274a5dc2a23b957da5dc806d2ac0c7a66af0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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