{"id":"CVE-2025-37759","title":"ublk: fix handling recovery & reissue in ublk_abort_queue()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: fix handling recovery & reissue in ublk_abort_queue()\n\nCommit 8284066946e6 (\"ublk: grab request reference when the request is handled\nby userspace\") doesn't grab …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < ab41bf5a211fbec3a85e025658ed90a911ccb692","Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < caa5c8a2358604f38bf0a4afaa5eacda13763067","Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 5d34a30efac9c9c93e150130caa940c0df6053c1","Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 0a21d259ca4d6310fdfcc0284ebbc000e66cbf70","Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f","Linux 6.5"],"published":"2025-05-01","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:36:27.136Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-37759","references":[{"url":"https://git.kernel.org/stable/c/ab41bf5a211fbec3a85e025658ed90a911ccb692"},{"url":"https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067"},{"url":"https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1"},{"url":"https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70"},{"url":"https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f"}],"tags":["cve.org"],"epss":0.0024,"epssPercentile":0.15006,"ingestedAt":"2026-10-21T12:48:53.712Z","slug":"CVE-2025-37759","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nublk: fix handling recovery & reissue in ublk_abort_queue()\n\nCommit 8284066946e6 (\"ublk: grab request reference when the request is handled\nby userspace\") doesn't grab request reference in case of recovery reissue.\nThen the request can be requeued & re-dispatch & failed when canceling\nuring command.\n\nIf it is one zc request, the request can be freed before io_uring\nreturns the zc buffer back, then cause kernel panic:\n\n[  126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8\n[  126.773657] #PF: supervisor read access in kernel mode\n[  126.774052] #PF: error_code(0x0000) - not-present page\n[  126.774455] PGD 0 P4D 0\n[  126.774698] Oops: Oops: 0000 [#1] SMP NOPTI\n[  126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full)\n[  126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n[  126.776275] Workqueue: iou_exit io_ring_exit_work\n[  126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv]\n\nFixes it by always grabbing request reference for aborting the request.\n\n## Affected\n\n- `Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < ab41bf5a211fbec3a85e025658ed90a911ccb692`\n- `Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < caa5c8a2358604f38bf0a4afaa5eacda13763067`\n- `Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 5d34a30efac9c9c93e150130caa940c0df6053c1`\n- `Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 0a21d259ca4d6310fdfcc0284ebbc000e66cbf70`\n- `Linux >= 8284066946e6d9cc979566ce698fe24e7ca0b31e < 6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f`\n- `Linux 6.5`\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":[]}