185 lines
9.7 KiB
JSON
185 lines
9.7 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-2026-97936",
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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": "2026-09-25T10:18:58.204Z",
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"datePublished": "2026-09-25T10:22:50.446Z",
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"dateUpdated": "2026-10-19T09:11:02.941Z"
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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": "2026-10-19T09:11:02.941Z"
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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\ntracing: Fix memory corruption from the histogram stacktrace modifier\n\nparse_field() sets HIST_FIELD_FL_STACKTRACE from the \".stacktrace\"\nmodifier before it looks the field name up, and nothing afterwards\nchecks that the name resolved to a field which holds a stacktrace.\ncreate_hist_field() picks HIST_FIELD_FN_STACK on the strength of the\nfield pointer alone, which reads a __data_loc word from the record and\nfollows its low 16 bits as an offset into the same record.\nevent_hist_trigger() takes the first word there as an entry count and\ncopies that many longs into a 31 entry array:\n\n\tn_entries = *stack;\n\tmemcpy(entries, ++stack, n_entries * sizeof(unsigned long));\n\nNeither end of that copy is bounded, and the count is whatever the event\nholds at the offset, so any field will do:\n\n # cd /sys/kernel/tracing/events/sched/sched_process_fork\n # echo 'hist:keys=parent_pid.stacktrace' > trigger\n # (true)\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n RIP: 0010:rb_insert_color+0x18/0x130\n timerqueue_linked_add+0x7e/0xd0\n enqueue_hrtimer+0x39/0xb0\n __hrtimer_run_queues+0x10f/0x1f0\n </IRQ>\n RIP: 0010:memcpy+0xc/0x30\n event_hist_trigger+0x165/0x690\n\nThe timer interrupt landed on the rbtree the copy had already run over.\nNo debug options are needed for this; KASAN reports the same write as an\nout-of-bounds read of 13835058055416381440 bytes.\n\nDocumentation/trace/histogram.rst already states the rule, \"must be a\nlong[] type\", so enforce it once the name has been resolved. Names which\nresolve to no field at all, \"hitcount.stacktrace\" and the common_*\npseudo-fields, are refused for the same reason: they hold no stacktrace\nto read."
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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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"kernel/trace/trace_events_hist.c"
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],
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"versions": [
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{
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"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314",
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"lessThan": "98da3379cdee343f671dac89b9afbd8b071f2591",
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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": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314",
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"lessThan": "e183b84968d4a6ea476d806ea97668405aa56880",
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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": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314",
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"lessThan": "57bfc2a17954d173d2a4182f3b582ffbb23aff64",
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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": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314",
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"lessThan": "55caaf25da2c2bb9b75307e4c868726cb954b1d6",
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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": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314",
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"lessThan": "a5e70ba87ca8ebc79b4e63de302d03b0625fe153",
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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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"kernel/trace/trace_events_hist.c"
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],
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"versions": [
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{
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"version": "6.3",
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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": "6.3",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "6.6.158"
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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": "6.3",
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"versionEndExcluding": "6.12.111"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3",
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"versionStartIncluding": "6.3",
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"versionEndExcluding": "7.2.7"
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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": "6.3",
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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/98da3379cdee343f671dac89b9afbd8b071f2591"
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},
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{
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"url": "https://git.kernel.org/stable/c/e183b84968d4a6ea476d806ea97668405aa56880"
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},
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{
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"url": "https://git.kernel.org/stable/c/57bfc2a17954d173d2a4182f3b582ffbb23aff64"
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},
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{
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"url": "https://git.kernel.org/stable/c/55caaf25da2c2bb9b75307e4c868726cb954b1d6"
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},
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{
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"url": "https://git.kernel.org/stable/c/a5e70ba87ca8ebc79b4e63de302d03b0625fe153"
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}
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],
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"title": "tracing: Fix memory corruption from the histogram stacktrace modifier",
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"x_generator": {
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}
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} |