{"api_version":"1","generated_at":"2026-10-01T13:59:51+00:00","cve":"CVE-2026-93219","urls":{"html":"https://cve.report/CVE-2026-93219","api":"https://cve.report/api/cve/CVE-2026-93219.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93219","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93219"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 16:17:17","updated_at":"2026-09-24 16:17:17"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44","name":"https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252","name":"https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7","name":"https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb","name":"https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e","name":"https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98","name":"https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943","name":"https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc","name":"https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93219","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93219","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 0cc4b14d7401d50e53a01f1554147ee075ee6943 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 53a3bc024b8e5d284468cce84957cded5f859f98 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 753a220084dfc4d737f2ab9eaddc9a01a397edd7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 151eb52f8712017c8f7b00bb2305e8916cb9e3dc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 bf38be01d43c4e4ca903aff7236d8486a950a252 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 f0efafcdf6eec1f3361bfd8c811420198f55c8bb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12e1480bcb4920c1b02b3793cb48756497919a60 d21808328225ab8cee46885bf9a0dffcefbe630e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/clocksource/timer-sun4i.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0cc4b14d7401d50e53a01f1554147ee075ee6943","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"53a3bc024b8e5d284468cce84957cded5f859f98","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"753a220084dfc4d737f2ab9eaddc9a01a397edd7","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"151eb52f8712017c8f7b00bb2305e8916cb9e3dc","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"bf38be01d43c4e4ca903aff7236d8486a950a252","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"f0efafcdf6eec1f3361bfd8c811420198f55c8bb","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"},{"lessThan":"d21808328225ab8cee46885bf9a0dffcefbe630e","status":"affected","version":"12e1480bcb4920c1b02b3793cb48756497919a60","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/clocksource/timer-sun4i.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-24T15:10:42.900Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943"},{"url":"https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98"},{"url":"https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7"},{"url":"https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44"},{"url":"https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc"},{"url":"https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252"},{"url":"https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb"},{"url":"https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e"}],"title":"clocksource/drivers/timer-sun4i: Advertise a real minimum delta","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93219","datePublished":"2026-09-24T15:10:42.900Z","dateReserved":"2026-09-17T16:02:15.094Z","dateUpdated":"2026-09-24T15:10:42.900Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 16:17:17","lastModifiedDate":"2026-09-24 16:17:17","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93219","Ordinal":"1","Title":"clocksource/drivers/timer-sun4i: Advertise a real minimum delta","CVE":"CVE-2026-93219","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93219","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"clocksource/drivers/timer-sun4i: Advertise a real minimum delta"}]}}}