{"id":"CVE-2026-53124","revision":null,"records":[{"revision":"671a74a5cde341b4b7d105d45b5b4804","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53124","aliases":[],"title":"ublk: reset per-IO canceled flag on each fetch","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: reset per-IO canceled flag on each fetch\n\nIf a ublk server starts recovering devices but dies before issuing fetch\ncommands for all IOs, cancellation of the fetch commands that were\nsuccessfully issued may never complete. This is because the per-IO\ncanceled flag can remain set even after the fetch for that IO has been\nsubmitted - the per-IO canceled flags for all IOs in a queue are reset\ntogether only once all IOs for that queue have been fetched. So if a\nnonempty proper subset of the IOs for a queue are fetched when the ublk\nserver dies, the IOs in that subset will never successfully be canceled,\nas their canceled flags remain set, and this prevents ublk_cancel_cmd\nfrom actually calling io_uring_cmd_done on the commands, despite the\nfact that they are outstanding.\n\nFix this by resetting the per-IO cancel flags immediately when each IO\nis fetched instead of waiting for all IOs for the queue (which may never\nhappen).","state":0,"publishedAt":"2026-06-24T16:30:53.268+00:00","modifiedAt":"2026-10-15T10:07:41.921+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/ublk_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b\",\n                            \"lessThan\": \"de05e37d02f3f33ebca4967164e54f5fea809d86\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b\",\n                            \"lessThan\": \"63335e5a67d89bb7cb9b023bbb3785896587a648\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b\",\n                            \"lessThan\": \"0842186d2c4e67d2f8c8c2d1d779e8acffd41b5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42ea64e01c96e594fb4f80c54dfe4f934d008a6e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.14.6\",\n                            \"lessThan\": \"6.15\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/ublk_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/de05e37d02f3f33ebca4967164e54f5fea809d86","https://git.kernel.org/stable/c/63335e5a67d89bb7cb9b023bbb3785896587a648","https://git.kernel.org/stable/c/0842186d2c4e67d2f8c8c2d1d779e8acffd41b5b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53124","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53124","identifiers":["CVE-2026-53124"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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