Answer in brief
CVE-2026-53286 records a High severity (CVSS 7.8) vulnerability in idpf: fix double free and use-after-free in aux device error paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <722b91d5086a249318c9d0e2b36aeac80ba8c808 || >=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <f319de7074e1728a9f9ff7134257360c694ec2b2 || >=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <6c77b9510829a424d1b74409b7db9456e3522871 | 722b91d5086a249318c9d0e2b36aeac80ba8c808, f319de7074e1728a9f9ff7134257360c694ec2b2, 6c77b9510829a424d1b74409b7db9456e3522871 |
| Linux/Linuxgeneric | 6.17 | Not reported |
Published upstream
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
In the Linux kernel, the following vulnerability has been resolved: idpf: fix double free and use-after-free in aux device error paths When auxiliary_device_add() fails in idpf_plug_vport_aux_dev() or idpf_plug_core_aux_dev(), the err_aux_dev_add label calls auxiliary_device_uninit() and falls through to err_aux_dev_init. The uninit call will trigger put_device(), which invokes the release callback (idpf_vport_adev_release / idpf_core_adev_release) that frees iadev. The fall-through then reads adev->id from the freed iadev for ida_free() and double-frees iadev with kfree(). Free the IDA slot and clear the back-pointer before uninit, while adev is still valid, then return immediately. Commit 65637c3a1811 ("idpf: fix UAF in RDMA core aux dev deinitialization") fixed the same use-after-free in the matching unplug path in this file but missed both probe error paths.
Quoted source text, attributed separately from HOL analysis.