bnge: Fix NULL pointer dereference in aux device release

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74706
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:45 UTC
Updated2026-08-22 16:16:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bnge: Fix NULL pointer dereference in aux device release If allocation of auxr_dev fails during auxiliary device setup, the error path calls auxiliary_device_uninit(), which eventually invokes bnge_aux_dev_release(). The release callback unconditionally dereferences aux_priv->auxr_dev->pdev to retrieve the parent bnge_dev. Since auxr_dev has not yet been allocated on this failure path, the dereference results in a NULL pointer exception Retrieve the parent bnge_dev from the auxiliary device's parent instead of auxr_dev, and free auxr_dev only when it was successfully allocated. This allows the release callback to correctly clean up partially initialized auxiliary devices.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554 83ef2f3cab7fe6dd9155cd598dc64be524d963a9 git Not specified
CNA Linux Linux affected 8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554 1cb4298810e27e037d3ca07286ecbb97e89ba58d git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/83ef2f3cab7fe6dd9155cd598dc64be524d963a9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1cb4298810e27e037d3ca07286ecbb97e89ba58d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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