{"id":"CVE-2026-93219","revision":"487281887fe54d7b9f049ddeb1ce19a5","records":[{"revision":"487281887fe54d7b9f049ddeb1ce19a5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93219","aliases":[],"title":"clocksource/drivers/timer-sun4i: Advertise a real minimum delta","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sun4i: Advertise a real minimum delta\n\nsun4i_clkevt_next_event() compensates for the timer stop/start\nsynchronization delay by programming evt - TIMER_SYNC_TICKS into the\nhardware interval register. The clockevent device currently advertises\nTIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed\nto call set_next_event() with evt == TIMER_SYNC_TICKS.\n\nThat programs a zero-tick interval. With oneshot/highres/nohz timer\noperation this can leave the next event stuck, which was observed as a\nboot hang on Allwinner D1 after the clockevents core started reusing\nforced minimum-delta events.\n\nAdvertise one extra tick instead, so the smallest event accepted by the\ncore still programs at least one hardware tick after the synchronization\ncompensation.","state":0,"publishedAt":"2026-09-24T15:10:42.9+00:00","modifiedAt":"2026-10-19T09:07:31.003+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/clocksource/timer-sun4i.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"0cc4b14d7401d50e53a01f1554147ee075ee6943\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"53a3bc024b8e5d284468cce84957cded5f859f98\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"753a220084dfc4d737f2ab9eaddc9a01a397edd7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"151eb52f8712017c8f7b00bb2305e8916cb9e3dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"bf38be01d43c4e4ca903aff7236d8486a950a252\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"f0efafcdf6eec1f3361bfd8c811420198f55c8bb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12e1480bcb4920c1b02b3793cb48756497919a60\",\n                            \"lessThan\": \"d21808328225ab8cee46885bf9a0dffcefbe630e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/clocksource/timer-sun4i.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943","https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98","https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7","https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44","https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc","https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252","https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb","https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93219","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93219","identifiers":["CVE-2026-93219"]},"retained":false,"historicalAffected":[]}],"coverage":[]}