362 lines
17 KiB
JSON
362 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2023-52606",
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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": "2024-03-02T21:55:42.573Z",
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"datePublished": "2024-03-06T06:45:31.257Z",
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"dateUpdated": "2026-08-05T09:10:40.049Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:10:40.049Z"
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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/lib: Validate size for vector operations\n\nSome of the fp/vmx code in sstep.c assume a certain maximum size for the\ninstructions being emulated. The size of those operations however is\ndetermined separately in analyse_instr().\n\nAdd a check to validate the assumption on the maximum size of the\noperations, so as to prevent any unintended kernel stack corruption."
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{
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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{
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"lang": "en",
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"value": "AV:L - The vulnerable FP/VMX emulation runs in the local alignment-exception path (alignment_exception → fix_alignment → emulate_loadstore), triggered by executing unaligned FP/Altivec instructions on PowerPC; it is not reachable via network packet processing.\nAC:L - An unprivileged attacker can reliably force the emulation path by executing crafted unaligned FP/VMX load/store instructions; no race or attacker-uncontrollable victim state is required.\nPR:L - Any unprivileged local user can trigger alignment exceptions in their own process; no capabilities or root privileges are needed to reach fix_alignment and the vulnerable helpers.\nUI:N - Exploitation requires only the attacker’s own process executing the crafted instructions; no action by another user is needed.\nS:U - Impact is confined to the host kernel authority (local privilege escalation / kernel memory corruption); KVM uses a separate emulate_loadstore path and this is not a guest-to-host escape.\nC:H - On the store paths, an oversized size causes copy_mem_out to read past the stack buffer and write kernel stack contents to attacker-controlled userspace, enabling arbitrary kernel memory disclosure; policy treats such memory corruption as C:H.\nI:H - On the load paths, copy_mem_in writes attacker-controlled userspace data past the fixed stack buffers, enabling kernel stack corruption and control-flow hijacking; buffer overflows of this class are scored I:H.\nA:H - Kernel stack corruption from the oversized copy can oops/panic the kernel; any such crash is scored A:H."
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