324 lines
16 KiB
JSON
324 lines
16 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-2023-52768",
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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": "2024-05-21T15:19:24.238Z",
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"datePublished": "2024-05-21T15:30:51.656Z",
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"dateUpdated": "2026-08-05T09:11:19.192Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:11:19.192Z"
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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\nwifi: wilc1000: use vmm_table as array in wilc struct\n\nEnabling KASAN and running some iperf tests raises some memory issues with\nvmm_table:\n\nBUG: KASAN: slab-out-of-bounds in wilc_wlan_handle_txq+0x6ac/0xdb4\nWrite of size 4 at addr c3a61540 by task wlan0-tx/95\n\nKASAN detects that we are writing data beyond range allocated to vmm_table.\nThere is indeed a mismatch between the size passed to allocator in\nwilc_wlan_init, and the range of possible indexes used later: allocation\nsize is missing a multiplication by sizeof(u32)"
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}
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],
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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 bug is in the local TX batching path (wilc_mac_xmit → wilc_wlan_handle_txq), not in parsing over-the-air frames; an attacker must generate outbound traffic on the wilc1000 netdev rather than inject Wi‑Fi/network protocol input.\nAC:L - Queuing ≥17 TX packets (indices past the 16 u32s that fit in the 64-byte allocation) reliably overflows the slab, as demonstrated by the iperf/KASAN report; the attacker fully controls packet rate and sizes with no race or uncontrollable layout required to trigger the write.\nPR:L - Once the interface is up, any unprivileged local user can send ordinary sockets traffic that hits ndo_start_xmit/wilc_mac_xmit; no CAP_NET_ADMIN or root is required on the vulnerable TX path.\nUI:N - The attacker triggers the overflow solely by transmitting packets themselves; no separate victim action such as mounting a device or opening a crafted file is needed.\nS:U - The slab out-of-bounds write corrupts host kernel heap within the same security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - A ~192-byte heap overflow into adjacent slab objects is memory corruption that can be leveraged for information disclosure (e.g., corrupted lengths/pointers later read), so Confidentiality is High per OOB-write guidance.\nI:H - The out-of-bounds writes of attacker-influenced packet-size fields into adjacent heap objects provide a classic integrity/control-flow hijack primitive for arbitrary kernel write and code execution.\nA:H - Writing past the undersized kmalloc(64) object corrupts adjacent slab memory and can oops/panic the kernel (as KASAN already flags), fully denying availability."
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}
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"drivers/net/wireless/microchip/wilc1000/wlan.c"
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"content": {
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"timestamp": "2024-05-29T18:50:15.574062Z",
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"id": "CVE-2023-52768",
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"options": [
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