219 lines
11 KiB
JSON
219 lines
11 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-2026-64070",
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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": "2026-07-19T07:54:57.030Z",
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"datePublished": "2026-07-19T15:39:46.536Z",
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"dateUpdated": "2026-11-06T16:34:25.359Z"
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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": "2026-09-02T12:49:39.984Z"
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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\npowerpc/hv-gpci: fix preempt count leak in sysfs show paths\n\nFour sysfs show() callbacks in hv-gpci take get_cpu_var(hv_gpci_reqb)\n(which calls preempt_disable()) but only call the matching put_cpu_var()\non the error path under the 'out:' label. Every successful read leaks\none preempt_disable():\n\n processor_bus_topology_show()\n processor_config_show()\n affinity_domain_via_virtual_processor_show()\n affinity_domain_via_domain_show()\n\n(affinity_domain_via_partition_show() was already correct.)\n\nOn a CONFIG_PREEMPT=y kernel, repeated reads raise preempt_count and\neventually return to userspace with preemption still disabled. The\nnext user-mode page fault then hits faulthandler_disabled() == 1,\ngets forced to SIGSEGV, and the resulting coredump trips\n'BUG: scheduling while atomic' in call_usermodehelper_exec ->\nwait_for_completion_state -> schedule:\n\n BUG: scheduling while atomic: <task>/<pid>/0x00000004\n ...\n __schedule_bug+0x6c/0x90\n __schedule+0x58c/0x13a0\n schedule+0x48/0x1a0\n schedule_timeout+0x104/0x170\n wait_for_completion_state+0x16c/0x330\n call_usermodehelper_exec+0x254/0x2d0\n vfs_coredump+0x1050/0x2590\n get_signal+0xb9c/0xc80\n do_notify_resume+0xf8/0x470\n\nAdd an out_success label that calls put_cpu_var() before returning\nthe byte count, mirroring affinity_domain_via_partition_show()."
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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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"arch/powerpc/perf/hv-gpci.c"
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],
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"versions": [
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{
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"version": "71f1c39647d8c9d4d54a861ec81f1ff17544bcb6",
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"lessThan": "b300312562fd6e4729697adb9f777f00ca0429f3",
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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": "71f1c39647d8c9d4d54a861ec81f1ff17544bcb6",
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"lessThan": "45afabe7f99c5d8746434ee41c86584c01d70147",
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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": "71f1c39647d8c9d4d54a861ec81f1ff17544bcb6",
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"lessThan": "b61ebb2826ca1852c2bbd92a676fb622c358cab4",
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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": "71f1c39647d8c9d4d54a861ec81f1ff17544bcb6",
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"lessThan": "903409000a07ac8e31ffedeb8516f4f8d67150c8",
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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": "71f1c39647d8c9d4d54a861ec81f1ff17544bcb6",
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"lessThan": "dbc30a57bd8e026995e9fa8e8c31cffd18542c01",
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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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"arch/powerpc/perf/hv-gpci.c"
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],
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"versions": [
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{
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"version": "6.6",
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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": "6.6",
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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": "6.6.156",
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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": "6.12.108",
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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": "6.18.49",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "6.6",
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"versionEndExcluding": "6.6.156"
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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": "6.6",
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"versionEndExcluding": "6.12.108"
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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": "6.6",
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"versionEndExcluding": "6.18.49"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "7.0.11"
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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": "6.6",
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"versionEndExcluding": "7.1"
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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/b300312562fd6e4729697adb9f777f00ca0429f3"
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},
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{
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"url": "https://git.kernel.org/stable/c/45afabe7f99c5d8746434ee41c86584c01d70147"
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},
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{
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"url": "https://git.kernel.org/stable/c/b61ebb2826ca1852c2bbd92a676fb622c358cab4"
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},
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{
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"url": "https://git.kernel.org/stable/c/903409000a07ac8e31ffedeb8516f4f8d67150c8"
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},
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{
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"url": "https://git.kernel.org/stable/c/dbc30a57bd8e026995e9fa8e8c31cffd18542c01"
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}
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],
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"title": "powerpc/hv-gpci: fix preempt count leak in sysfs show paths",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64070",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:29:37.174523Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T16:34:25.359Z"
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}
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}
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]
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}
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} |