{"cve":"CVE-2026-72482","nvd":{"published":"2026-08-15T06:22:22.430","modified":"2026-08-17T06:19:16.347","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpib: fix double decrement of descriptor_busy in command_ioctl()\n\ncommit d1857f8296dc (\"gpib: fix use-after-free in IO ioctl handlers\")\nintroduced a descriptor_busy reference counter to pin struct\ngpib_descriptor across IO ioctl operations.  In command_ioctl(), the\nerror path inside the loop decrements descriptor_busy and breaks, but\nexecution then falls through to the unconditional decrement after the\nloop, underflowing the counter to -1.\n\nThis re-enables the use-after-free that the original fix was meant to\nprevent: a concurrent close_dev_ioctl() sees descriptor_busy == 0 on\nan actively-used descriptor and frees it.\n\nRemove the early decrement from the error path.  The post-loop\ndecrement already handles all exit paths, matching the correct pattern\nused in read_ioctl() and write_ioctl().","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":[],"references":["https://git.kernel.org/stable/c/8b5f1d295dda8677e4545ce340053fcfa8b634c7","https://git.kernel.org/stable/c/c4faab452b3c1ada003d49c477609dd80523b9bf","https://git.kernel.org/stable/c/fdee9f207a48ce204ec6cfceaa1459d2473600a5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-72482","score":0.00177,"percentile":0.07308,"date":"2026-10-31"},"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."]}