{"apiVersion":"1.0","identifier":"CVE-2026-74472","description":"In the Linux kernel, the following vulnerability has been resolved: ublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev() ublk_ctrl_add_dev() memcpy()s the userspace ublksrv_ctrl_dev_info into ub->dev_info and then fixes up the fields the driver owns, but misses ->state and ->ublksrv_pid. A device added with ->state = UBLK_S_DEV_LIVE passes the -->state != UBLK_S_DEV_DEAD- test that ublk_stop_dev_unlocked() uses as its proxy for -a disk is attached-, while ->ub_disk is still NULL, so DEL_DEV right after ADD_DEV oopses in del_gendisk(). UBLK_S_DEV_QUIESCED plus UBLK_F_USER_RECOVERY dies one step earlier, in ublk_force_abort_dev(). A poisoned ->state also gets START_USER_RECOVERY and the char device read/write path onto a device that was never started, and wedges START_DEV at -EEXIST. A poisoned ->ublksrv_pid just makes GET_DEV_INFO report an unrelated task as the ublk server. Reset both after the memcpy(), as ublk_detach_disk() does. Userspace only ever reads these back, so correcting them silently breaks nothing. ADD_DEV has copied ->state in unsanitized since ublk was merged, but back then it was harmless: the gendisk was allocated during ADD_DEV, and both teardown and the START_DEV -EEXIST check keyed off disk_live() rather than ->state. The oops became reachable once the disk allocation moved to START_DEV and those checks switched to ->state.","publishedAt":"2026-08-15T13:17:51","lastModifiedAt":"2026-08-19T17:21:04","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74472","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00173,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74472","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74472","en":"https://www.redsauce.net/en/cves/CVE-2026-74472","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74472","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74472","de":"https://www.redsauce.net/de/cves/CVE-2026-74472","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74472","el":"https://www.redsauce.net/el/cves/CVE-2026-74472"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74472"}}