Bug 2436760 (CVE-2026-23042) - CVE-2026-23042 kernel: idpf: fix aux device unplugging when rdma is not supported by vport
Summary: CVE-2026-23042 kernel: idpf: fix aux device unplugging when rdma is not suppo...
Keywords:
Status: NEW
Alias: CVE-2026-23042
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-04 17:02 UTC by OSIDB Bzimport
Modified: 2026-02-05 08:42 UTC (History)
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Description OSIDB Bzimport 2026-02-04 17:02:02 UTC 
In the Linux kernel, the following vulnerability has been resolved:

idpf: fix aux device unplugging when rdma is not supported by vport

If vport flags do not contain VIRTCHNL2_VPORT_ENABLE_RDMA, driver does not
allocate vdev_info for this vport. This leads to kernel NULL pointer
dereference in idpf_idc_vport_dev_down(), which references vdev_info for
every vport regardless.

Check, if vdev_info was ever allocated before unplugging aux device.
Comment 1 TEJ RATHI 2026-02-05 08:29:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026020439-CVE-2026-23042-ce47@gregkh/T
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