320 lines
15 KiB
JSON
320 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-26906",
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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": "2024-02-19T14:20:24.187Z",
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"datePublished": "2024-04-17T10:27:53.573Z",
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"dateUpdated": "2026-10-15T00:39:19.767Z"
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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": "2026-05-11T20:06:40.672Z"
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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\nx86/mm: Disallow vsyscall page read for copy_from_kernel_nofault()\n\nWhen trying to use copy_from_kernel_nofault() to read vsyscall page\nthrough a bpf program, the following oops was reported:\n\n BUG: unable to handle page fault for address: ffffffffff600000\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 3231067 P4D 3231067 PUD 3233067 PMD 3235067 PTE 0\n Oops: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 PID: 20390 Comm: test_progs ...... 6.7.0+ #58\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ......\n RIP: 0010:copy_from_kernel_nofault+0x6f/0x110\n ......\n Call Trace:\n <TASK>\n ? copy_from_kernel_nofault+0x6f/0x110\n bpf_probe_read_kernel+0x1d/0x50\n bpf_prog_2061065e56845f08_do_probe_read+0x51/0x8d\n trace_call_bpf+0xc5/0x1c0\n perf_call_bpf_enter.isra.0+0x69/0xb0\n perf_syscall_enter+0x13e/0x200\n syscall_trace_enter+0x188/0x1c0\n do_syscall_64+0xb5/0xe0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n </TASK>\n ......\n ---[ end trace 0000000000000000 ]---\n\nThe oops is triggered when:\n\n1) A bpf program uses bpf_probe_read_kernel() to read from the vsyscall\npage and invokes copy_from_kernel_nofault() which in turn calls\n__get_user_asm().\n\n2) Because the vsyscall page address is not readable from kernel space,\na page fault exception is triggered accordingly.\n\n3) handle_page_fault() considers the vsyscall page address as a user\nspace address instead of a kernel space address. This results in the\nfix-up setup by bpf not being applied and a page_fault_oops() is invoked\ndue to SMAP.\n\nConsidering handle_page_fault() has already considered the vsyscall page\naddress as a userspace address, fix the problem by disallowing vsyscall\npage read for copy_from_kernel_nofault()."
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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/x86/mm/maccess.c"
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],
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"arch/x86/mm/maccess.c"
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],
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"versions": [
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{
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"version": "5.5",
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"status": "affected"
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{
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"version": "0",
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"status": "unaffected",
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},
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{
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"version": "5.10.214",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.153",
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"version": "6.1.83",
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"status": "unaffected",
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},
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{
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"version": "6.6.23",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.7.11",
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"lessThanOrEqual": "6.7.*",
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"status": "unaffected",
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},
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{
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"version": "6.8",
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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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"id": "CVE-2024-26906",
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"role": "CISA Coordinator",
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"options": [
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"Exploitation": "none"
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"vendor": "Siemens",
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