248 lines
13 KiB
JSON
248 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-68090",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-30T09:28:09.367Z",
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"datePublished": "2026-08-10T11:51:45.149Z",
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"dateUpdated": "2026-08-17T04:58:38.177Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:58:38.177Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"lib/debugobjects.c"
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],
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"versions": [
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "2d5e320b7ab9b25229ac4331541964a58b5e1d29",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "203a965bf2ab43130778d8214fb0c3c8c2d19cdf",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "23da32e88627e63e0864f59f4c63a2dc0ab851a3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "d663fbf28b2eebe665bb9cf828d7d528e5a8707e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "e2e255d07723c330dded8e576ce28a8d23a692ce",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "c00164c9e7fa6145886ad666806cb5347895de5c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "1f4f02b336c3be125c8fcf87df73db2e0e028b8b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b84d435cc228e87951f3bbabf6cc4a5f25d5fb16",
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"lessThan": "b81dde13cc163450dcb402dcc915ef13ba241e01",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"lib/debugobjects.c"
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],
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"versions": [
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{
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"version": "3.3",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.3",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.96",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.39",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "5.10.261"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "5.15.212"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.1.178"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.6.145"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.12.96"
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},
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{
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.18.39"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "7.1.4"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29"
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},
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{
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"url": "https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf"
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},
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{
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"url": "https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b"
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},
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{
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"url": "https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01"
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}
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],
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"title": "debugobjects: Plug race against a concurrent OOM disable",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |