mirror of
https://github.com/CVEProject/cvelist.git
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102 lines
6.2 KiB
JSON
102 lines
6.2 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-50114",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Unregister redistributor for failed vCPU creation\n\nAlex reports that syzkaller has managed to trigger a use-after-free when\ntearing down a VM:\n\n BUG: KASAN: slab-use-after-free in kvm_put_kvm+0x300/0xe68 virt/kvm/kvm_main.c:5769\n Read of size 8 at addr ffffff801c6890d0 by task syz.3.2219/10758\n\n CPU: 3 UID: 0 PID: 10758 Comm: syz.3.2219 Not tainted 6.11.0-rc6-dirty #64\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n dump_backtrace+0x17c/0x1a8 arch/arm64/kernel/stacktrace.c:317\n show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x94/0xc0 lib/dump_stack.c:119\n print_report+0x144/0x7a4 mm/kasan/report.c:377\n kasan_report+0xcc/0x128 mm/kasan/report.c:601\n __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381\n kvm_put_kvm+0x300/0xe68 virt/kvm/kvm_main.c:5769\n kvm_vm_release+0x4c/0x60 virt/kvm/kvm_main.c:1409\n __fput+0x198/0x71c fs/file_table.c:422\n ____fput+0x20/0x30 fs/file_table.c:450\n task_work_run+0x1cc/0x23c kernel/task_work.c:228\n do_notify_resume+0x144/0x1a0 include/linux/resume_user_mode.h:50\n el0_svc+0x64/0x68 arch/arm64/kernel/entry-common.c:169\n el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730\n el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598\n\nUpon closer inspection, it appears that we do not properly tear down the\nMMIO registration for a vCPU that fails creation late in the game, e.g.\na vCPU w/ the same ID already exists in the VM.\n\nIt is important to consider the context of commit that introduced this bug\nby moving the unregistration out of __kvm_vgic_vcpu_destroy(). That\nchange correctly sought to avoid an srcu v. config_lock inversion by\nbreaking up the vCPU teardown into two parts, one guarded by the\nconfig_lock.\n\nFix the use-after-free while avoiding lock inversion by adding a\nspecial-cased unregistration to __kvm_vgic_vcpu_destroy(). This is safe\nbecause failed vCPUs are torn down outside of the config_lock."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "f616506754d3",
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"version_value": "6bcc2890b883"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "6.11",
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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": "6.11",
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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": "6.11.6",
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"lessThanOrEqual": "6.11.*",
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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",
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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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"defaultStatus": "affected"
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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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}
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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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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/6bcc2890b883ba1d16b8942937750565f6e9db0d",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/6bcc2890b883ba1d16b8942937750565f6e9db0d"
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},
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{
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"url": "https://git.kernel.org/stable/c/ae8f8b37610269009326f4318df161206c59843e",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/ae8f8b37610269009326f4318df161206c59843e"
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}
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]
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},
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"generator": {
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"engine": "bippy-8e903de6a542"
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}
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} |