{"api_version":"1","generated_at":"2026-08-11T03:20:24+00:00","cve":"CVE-2026-68090","urls":{"html":"https://cve.report/CVE-2026-68090","api":"https://cve.report/api/cve/CVE-2026-68090.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68090","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68090"},"summary":{"title":"debugobjects: Plug race against a concurrent OOM disable","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Plug race against a concurrent OOM disable\n\nsyzbot reported a puzzling splat:\n\n   WARNING: kernel/time/hrtimer.c:443 at stub_timer+0xa/0x20\n\nstub_timer() is installed as timer callback function in\nhrtimer_fixup_assert_init(), which is invoked when\ndebug_object_assert_init() can't find a shadow object. In that case debug\nobjects emits a warning about it before invoking the fixup.\n\nThough the provided console log lacks this warning and instead has the\nfollowing a few seconds before the splat:\n\n     ODEBUG: Out of memory. ODEBUG disabled\n\nSo the object was looked up in debug_object_assert_init() and the lookup\nfailed due a concurrent out of memory situation which disabled debug\nobjects and freed the shadow objects:\n\ndebug_object_assert_init()\n        if (!debug_objects_enabled)\n        \treturn;                         obj = alloc();\n                \t\t\t\tif (!obj) {\n\t\t\t\t\t\t\t// Out of memory\n                                                \tdebug_objects_enabled = false;\n                                                        free_objects();\n        obj = lookup_or_alloc();\n\n        // The lookup failed because the other side\n        // removed the objects, so this returns\n        // an error code as the object in question\n        // is not statically initialized\n\n\tif (!IS_ERR_OR_NULL(obj))\n        \treturn;\n        if (!obj) {\n        \tdebug_oom();\n                return;\n        }\n\n        print(...)\n           if (!debug_objects_enabled)\n                return;\n\n        fixup(...)\n\nThe debug object splat is skipped because debug_objects_enabled is false,\nbut the fixup callback is invoked unconditionally, which makes the timer\ndisfunctional.\n\nThis is only a problem in debug_object_assert_init() and\ndebug_object_activate() as both have to handle statically initialized\nobjects and therefore must handle the error pointer return case\ngracefully. All other places only handle the found/not found case and the\nNULL pointer return is a signal for OOM. Otherwise they get a valid shadow\nobject.\n\nPlug the hole by checking whether debug objects are still enabled before\ninvoking the print and fixup function in those two places.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 12:17:21","updated_at":"2026-08-10 12:17:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29","name":"https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e","name":"https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c","name":"https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01","name":"https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3","name":"https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf","name":"https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce","name":"https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b","name":"https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68090","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68090","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 2d5e320b7ab9b25229ac4331541964a58b5e1d29 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 203a965bf2ab43130778d8214fb0c3c8c2d19cdf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 23da32e88627e63e0864f59f4c63a2dc0ab851a3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 d663fbf28b2eebe665bb9cf828d7d528e5a8707e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 e2e255d07723c330dded8e576ce28a8d23a692ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 c00164c9e7fa6145886ad666806cb5347895de5c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 1f4f02b336c3be125c8fcf87df73db2e0e028b8b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b84d435cc228e87951f3bbabf6cc4a5f25d5fb16 b81dde13cc163450dcb402dcc915ef13ba241e01 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-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":["lib/debugobjects.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2d5e320b7ab9b25229ac4331541964a58b5e1d29","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"203a965bf2ab43130778d8214fb0c3c8c2d19cdf","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"23da32e88627e63e0864f59f4c63a2dc0ab851a3","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"d663fbf28b2eebe665bb9cf828d7d528e5a8707e","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"e2e255d07723c330dded8e576ce28a8d23a692ce","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"c00164c9e7fa6145886ad666806cb5347895de5c","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"1f4f02b336c3be125c8fcf87df73db2e0e028b8b","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"},{"lessThan":"b81dde13cc163450dcb402dcc915ef13ba241e01","status":"affected","version":"b84d435cc228e87951f3bbabf6cc4a5f25d5fb16","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["lib/debugobjects.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.3"},{"lessThan":"3.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"3.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Plug race against a concurrent OOM disable\n\nsyzbot reported a puzzling splat:\n\n   WARNING: kernel/time/hrtimer.c:443 at stub_timer+0xa/0x20\n\nstub_timer() is installed as timer callback function in\nhrtimer_fixup_assert_init(), which is invoked when\ndebug_object_assert_init() can't find a shadow object. In that case debug\nobjects emits a warning about it before invoking the fixup.\n\nThough the provided console log lacks this warning and instead has the\nfollowing a few seconds before the splat:\n\n     ODEBUG: Out of memory. ODEBUG disabled\n\nSo the object was looked up in debug_object_assert_init() and the lookup\nfailed due a concurrent out of memory situation which disabled debug\nobjects and freed the shadow objects:\n\ndebug_object_assert_init()\n        if (!debug_objects_enabled)\n        \treturn;                         obj = alloc();\n                \t\t\t\tif (!obj) {\n\t\t\t\t\t\t\t// Out of memory\n                                                \tdebug_objects_enabled = false;\n                                                        free_objects();\n        obj = lookup_or_alloc();\n\n        // The lookup failed because the other side\n        // removed the objects, so this returns\n        // an error code as the object in question\n        // is not statically initialized\n\n\tif (!IS_ERR_OR_NULL(obj))\n        \treturn;\n        if (!obj) {\n        \tdebug_oom();\n                return;\n        }\n\n        print(...)\n           if (!debug_objects_enabled)\n                return;\n\n        fixup(...)\n\nThe debug object splat is skipped because debug_objects_enabled is false,\nbut the fixup callback is invoked unconditionally, which makes the timer\ndisfunctional.\n\nThis is only a problem in debug_object_assert_init() and\ndebug_object_activate() as both have to handle statically initialized\nobjects and therefore must handle the error pointer return case\ngracefully. All other places only handle the found/not found case and the\nNULL pointer return is a signal for OOM. Otherwise they get a valid shadow\nobject.\n\nPlug the hole by checking whether debug objects are still enabled before\ninvoking the print and fixup function in those two places."}],"providerMetadata":{"dateUpdated":"2026-08-10T11:51:45.149Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29"},{"url":"https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf"},{"url":"https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3"},{"url":"https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e"},{"url":"https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce"},{"url":"https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c"},{"url":"https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b"},{"url":"https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01"}],"title":"debugobjects: Plug race against a concurrent OOM disable","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68090","datePublished":"2026-08-10T11:51:45.149Z","dateReserved":"2026-07-30T09:28:09.367Z","dateUpdated":"2026-08-10T11:51:45.149Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 12:17:21","lastModifiedDate":"2026-08-10 12:17:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68090","Ordinal":"1","Title":"debugobjects: Plug race against a concurrent OOM disable","CVE":"CVE-2026-68090","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68090","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Plug race against a concurrent OOM disable\n\nsyzbot reported a puzzling splat:\n\n   WARNING: kernel/time/hrtimer.c:443 at stub_timer+0xa/0x20\n\nstub_timer() is installed as timer callback function in\nhrtimer_fixup_assert_init(), which is invoked when\ndebug_object_assert_init() can't find a shadow object. In that case debug\nobjects emits a warning about it before invoking the fixup.\n\nThough the provided console log lacks this warning and instead has the\nfollowing a few seconds before the splat:\n\n     ODEBUG: Out of memory. ODEBUG disabled\n\nSo the object was looked up in debug_object_assert_init() and the lookup\nfailed due a concurrent out of memory situation which disabled debug\nobjects and freed the shadow objects:\n\ndebug_object_assert_init()\n        if (!debug_objects_enabled)\n        \treturn;                         obj = alloc();\n                \t\t\t\tif (!obj) {\n\t\t\t\t\t\t\t// Out of memory\n                                                \tdebug_objects_enabled = false;\n                                                        free_objects();\n        obj = lookup_or_alloc();\n\n        // The lookup failed because the other side\n        // removed the objects, so this returns\n        // an error code as the object in question\n        // is not statically initialized\n\n\tif (!IS_ERR_OR_NULL(obj))\n        \treturn;\n        if (!obj) {\n        \tdebug_oom();\n                return;\n        }\n\n        print(...)\n           if (!debug_objects_enabled)\n                return;\n\n        fixup(...)\n\nThe debug object splat is skipped because debug_objects_enabled is false,\nbut the fixup callback is invoked unconditionally, which makes the timer\ndisfunctional.\n\nThis is only a problem in debug_object_assert_init() and\ndebug_object_activate() as both have to handle statically initialized\nobjects and therefore must handle the error pointer return case\ngracefully. All other places only handle the found/not found case and the\nNULL pointer return is a signal for OOM. Otherwise they get a valid shadow\nobject.\n\nPlug the hole by checking whether debug objects are still enabled before\ninvoking the print and fixup function in those two places.","Type":"Description","Title":"debugobjects: Plug race against a concurrent OOM disable"}]}}}