{"api_version":"1","generated_at":"2026-06-06T01:32:43+00:00","cve":"CVE-2026-46257","urls":{"html":"https://cve.report/CVE-2026-46257","api":"https://cve.report/api/cve/CVE-2026-46257.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46257","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46257"},"summary":{"title":"clocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.\n\nOn SP804, the delay timer shares the same clkevt instance with\nsched_clock. On some platforms, when\nsp804_clocksource_and_sched_clock_init is called with use_sched_clock\nnot set to 1, sched_clkevt is not properly initialized. However,\nsp804_register_delay_timer is invoked unconditionally, and\nread_current_timer() subsequently calls sp804_read on an uninitialized\nsched_clkevt, leading to a kernel Oops when accessing\nsched_clkevt->value.\n\nDeclare a dedicated clkevt instance exclusively for delay timer,\ninstead of sharing the same clkevt with sched_clock.  This ensures\nthat read_current_timer continues to work correctly regardless of\nwhether SP804 is selected as the sched_clock.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:26","updated_at":"2026-06-05 20:51:20"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9","name":"https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352","name":"https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46257","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46257","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 640594a04f119338019b0aeed70c7301216595b3 693b0b594b0f278bafa784984129c0c0f988e352 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 640594a04f119338019b0aeed70c7301216595b3 694921a93f3e3621e067afc545cedf6fe3b234a9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46257","cve":"CVE-2026-46257","epss":"0.000180000","percentile":"0.051530000","score_date":"2026-06-05","updated_at":"2026-06-06 00:14:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/clocksource/timer-sp804.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"693b0b594b0f278bafa784984129c0c0f988e352","status":"affected","version":"640594a04f119338019b0aeed70c7301216595b3","versionType":"git"},{"lessThan":"694921a93f3e3621e067afc545cedf6fe3b234a9","status":"affected","version":"640594a04f119338019b0aeed70c7301216595b3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/clocksource/timer-sp804.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.\n\nOn SP804, the delay timer shares the same clkevt instance with\nsched_clock. On some platforms, when\nsp804_clocksource_and_sched_clock_init is called with use_sched_clock\nnot set to 1, sched_clkevt is not properly initialized. However,\nsp804_register_delay_timer is invoked unconditionally, and\nread_current_timer() subsequently calls sp804_read on an uninitialized\nsched_clkevt, leading to a kernel Oops when accessing\nsched_clkevt->value.\n\nDeclare a dedicated clkevt instance exclusively for delay timer,\ninstead of sharing the same clkevt with sched_clock.  This ensures\nthat read_current_timer continues to work correctly regardless of\nwhether SP804 is selected as the sched_clock."}],"providerMetadata":{"dateUpdated":"2026-06-03T15:49:54.286Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352"},{"url":"https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9"}],"title":"clocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46257","datePublished":"2026-06-03T15:49:54.286Z","dateReserved":"2026-05-13T15:03:33.108Z","dateUpdated":"2026-06-03T15:49:54.286Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:26","lastModifiedDate":"2026-06-05 20:51:20","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46257","Ordinal":"1","Title":"clocksource/drivers/timer-sp804: Fix an Oops when read_current_t","CVE":"CVE-2026-46257","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46257","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.\n\nOn SP804, the delay timer shares the same clkevt instance with\nsched_clock. On some platforms, when\nsp804_clocksource_and_sched_clock_init is called with use_sched_clock\nnot set to 1, sched_clkevt is not properly initialized. However,\nsp804_register_delay_timer is invoked unconditionally, and\nread_current_timer() subsequently calls sp804_read on an uninitialized\nsched_clkevt, leading to a kernel Oops when accessing\nsched_clkevt->value.\n\nDeclare a dedicated clkevt instance exclusively for delay timer,\ninstead of sharing the same clkevt with sched_clock.  This ensures\nthat read_current_timer continues to work correctly regardless of\nwhether SP804 is selected as the sched_clock.","Type":"Description","Title":"clocksource/drivers/timer-sp804: Fix an Oops when read_current_t"}]}}}