{"id":"CVE-2026-99263","revision":"ebfbfd44f8df4273ad4098cdd643c356","records":[{"revision":"ebfbfd44f8df4273ad4098cdd643c356","observedAt":"2026-11-03T12:57:16.958+00:00","statement":{"source":"cve-program","id":"CVE-2026-99263","aliases":[],"title":"io_uring/poll: avoid retry wakeup loss when dropping ownership","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: avoid retry wakeup loss when dropping ownership\n\nIf a wakeup sets IO_POLL_RETRY_FLAG between the owning task consuming\nthe existing instance of IO_POLL_RETRY_FLAG and the loop check\nof io_poll_check_events(), then we stall on processing the request\nuntil an unrelated wakeup comes along.\n\nUsing atomic_cmpxchg instead of atomic_sub_return to guarantee both the\ncount v and poll_refs are 0 and no wake-ups are missed.","state":0,"publishedAt":"2026-11-03T11:48:15.743+00:00","modifiedAt":"2026-11-03T11:48:15.743+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                        \"io_uring/poll.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"d1f6850086ac6f8b0fa44fb19aa2a468c73ee071\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"4ef685b8505615729d75c875f52822238bf76ca6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a26a35e9019fd70bf3cf647dcfdae87abc7bacea\",\n                            \"lessThan\": \"521e8a65e9b45532295ba1082ef12be6e80c173b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bc4e6ee16778149811333a969a7a893d4cc110c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.15.82\",\n                            \"lessThan\": \"5.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.0.11\",\n                            \"lessThan\": \"6.1\",\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                        \"io_uring/poll.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.191\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.161\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.115\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.60\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.14\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3.1\",\n                            \"lessThanOrEqual\": \"7.3.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/d1f6850086ac6f8b0fa44fb19aa2a468c73ee071","https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf","https://git.kernel.org/stable/c/4ef685b8505615729d75c875f52822238bf76ca6","https://git.kernel.org/stable/c/afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0","https://git.kernel.org/stable/c/eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1","https://git.kernel.org/stable/c/521e8a65e9b45532295ba1082ef12be6e80c173b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99263","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99263","identifiers":["CVE-2026-99263"]},"retained":false,"historicalAffected":[]}],"coverage":[]}