{"id":"CVE-2026-53188","title":"RDMA/core: Validate the passed in fops for ib_get_ucaps()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Validate the passed in fops for ib_get_ucaps()\n\nSashiko pointed out it is not safe to rely only on the devt because\nchar/block alias so if the user finds a b…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 61e51682816d395307f78ae06d640089054c28ab < 96b6e98ff12d50ed5817230c6f1188e1150d225d","Linux >= 61e51682816d395307f78ae06d640089054c28ab < aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b","Linux >= 61e51682816d395307f78ae06d640089054c28ab < 4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee","Linux 6.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:26:27.618185Z"},"published":"2026-06-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:31:35.863Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53188","references":[{"url":"https://git.kernel.org/stable/c/96b6e98ff12d50ed5817230c6f1188e1150d225d"},{"url":"https://git.kernel.org/stable/c/aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b"},{"url":"https://git.kernel.org/stable/c/4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee"}],"tags":["cve.org"],"epss":0.00127,"epssPercentile":0.02132,"ingestedAt":"2026-10-16T17:24:46.734Z","slug":"CVE-2026-53188","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Validate the passed in fops for ib_get_ucaps()\n\nSashiko pointed out it is not safe to rely only on the devt because\nchar/block alias so if the user finds a block device with the same dev_t\nit can masquerade as a ucap cdev fd.\n\nTest the f_ops to only accept authentic cdevs.\n\n## Affected\n\n- `Linux >= 61e51682816d395307f78ae06d640089054c28ab < 96b6e98ff12d50ed5817230c6f1188e1150d225d`\n- `Linux >= 61e51682816d395307f78ae06d640089054c28ab < aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b`\n- `Linux >= 61e51682816d395307f78ae06d640089054c28ab < 4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee`\n- `Linux 6.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}