{"cve":"CVE-2026-63907","nvd":{"published":"2026-07-19T16:17:08.517","modified":"2026-10-30T14:30:10.193","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nuio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory\n\nuio_pci_sva allocates struct uio_pci_sva_dev with devm_kzalloc() in\nprobe(), but then calls kfree(udev) both on the probe() error path\n(label out_free) and again in remove().\n\nBecause devm_kzalloc() allocations are devres-managed and are freed\nautomatically when the device is detached (including after a failing\nprobe() and during driver unbind), the explicit kfree() can lead to a\ndouble free.\n\nIf probe() fails after devm_kzalloc(), the error path frees udev and\ndevres cleanup will free it again when the core unwinds the partially\nbound device. On normal driver removal, remove() frees udev and devres\nwill free it again when the device is detached.\n\nThis issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix by removing the manual kfree() calls\nand dropping the now-unused label.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-415"],"references":["https://git.kernel.org/stable/c/e344865bfca4eb37ed8d7ac5917226e49fcec7ce","https://git.kernel.org/stable/c/f74c8696f14149d5e43cc28b015326a759c48f00"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T14:49:48.263840089+00:00"},"epss":{"cve":"CVE-2026-63907","score":0.00198,"percentile":0.09582,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}