{"id":"CVE-2026-53286","title":"idpf: fix double free and use-after-free in aux device error paths","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix double free and use-after-free in aux device error paths\n\nWhen auxiliary_device_add() fails in idpf_plug_vport_aux_dev() or\nidpf_plug_core_aux_dev(), the err_…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < 722b91d5086a249318c9d0e2b36aeac80ba8c808","Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < f319de7074e1728a9f9ff7134257360c694ec2b2","Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < 6c77b9510829a424d1b74409b7db9456e3522871","Linux 6.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:25:17.978547Z"},"published":"2026-06-26","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:34:17.925Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53286","references":[{"url":"https://git.kernel.org/stable/c/722b91d5086a249318c9d0e2b36aeac80ba8c808"},{"url":"https://git.kernel.org/stable/c/f319de7074e1728a9f9ff7134257360c694ec2b2"},{"url":"https://git.kernel.org/stable/c/6c77b9510829a424d1b74409b7db9456e3522871"}],"tags":["cve.org"],"epss":0.00126,"epssPercentile":0.02336,"ingestedAt":"2026-11-06T16:57:43.255Z","slug":"CVE-2026-53286","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix double free and use-after-free in aux device error paths\n\nWhen auxiliary_device_add() fails in idpf_plug_vport_aux_dev() or\nidpf_plug_core_aux_dev(), the err_aux_dev_add label calls\nauxiliary_device_uninit() and falls through to err_aux_dev_init.  The\nuninit call will trigger put_device(), which invokes the release\ncallback (idpf_vport_adev_release / idpf_core_adev_release) that frees\niadev.  The fall-through then reads adev->id from the freed iadev for\nida_free() and double-frees iadev with kfree().\n\nFree the IDA slot and clear the back-pointer before uninit, while adev\nis still valid, then return immediately.\n\nCommit 65637c3a1811 (\"idpf: fix UAF in RDMA core aux dev deinitialization\")\nfixed the same use-after-free in the matching unplug path in this file but\nmissed both probe error paths.\n\n## Affected\n\n- `Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < 722b91d5086a249318c9d0e2b36aeac80ba8c808`\n- `Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < f319de7074e1728a9f9ff7134257360c694ec2b2`\n- `Linux >= f4312e6bfa2a98e94dacc75f96f916b76bdf4259 < 6c77b9510829a424d1b74409b7db9456e3522871`\n- `Linux 6.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}