194 lines
9.3 KiB
JSON
194 lines
9.3 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-2022-48665",
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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": "2024-02-25T13:44:28.320Z",
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"datePublished": "2024-04-28T13:01:46.203Z",
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"dateUpdated": "2026-08-05T08:51:40.854Z"
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},
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"dateUpdated": "2026-08-05T08:51:40.854Z"
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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\nexfat: fix overflow for large capacity partition\n\nUsing int type for sector index, there will be overflow in a large\ncapacity partition.\n\nFor example, if storage with sector size of 512 bytes and partition\ncapacity is larger than 2TB, there will be overflow."
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"metrics": [
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{
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"baseScore": 7.1,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is in exfat_zeroed_cluster(), reached only via local mkdir/directory-expansion paths (exfat_mkdir → exfat_alloc_new_dir / exfat_find_empty_entry) on a mounted exFAT volume, not via network packet processing.\nAC:L - An attacker who can write to a >2TB exFAT volume can fill lower clusters then create a directory so allocation returns a high cluster whose sector index truncates when assigned to int, reliably triggering the overflow.\nPR:L - Triggering requires only unprivileged write access to an already-mounted exFAT filesystem (common for automounted removable media); no root or init-namespace capabilities are needed for the vulnerable allocation path.\nUI:N - Once the volume is mounted writable, the attacker triggers the flaw solely by their own mkdir/directory-growth operations with no further victim interaction.\nS:U - Impact stays within the host kernel/filesystem authority; this is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:N - The overflow causes wrong-sector zeroing via legitimate buffer_heads or skips zeroing; it does not provide a kernel memory read primitive or other information disclosure beyond normal filesystem access.\nI:H - Truncating sector_t blknr into int makes the loop zero the wrong sectors (e.g. from 0 through INT_MAX, ~1TiB), overwriting boot/FAT/bitmap and other volume data and destroying filesystem integrity.\nA:H - The same truncated loop can issue on the order of 2^31 block zeroing operations and then hit signed overflow UB, causing prolonged hang, severe I/O DoS, or kernel instability."
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}
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]
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}
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"affected": [
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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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"fs/exfat/fatent.c"
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],
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"fs/exfat/fatent.c"
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"version": "0",
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"lessThan": "5.19",
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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": "5.19.12",
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"lessThanOrEqual": "5.19.*",
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"status": "unaffected",
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},
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{
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"version": "6.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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"versionEndExcluding": "5.19.12"
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"references": [
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}
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"title": "exfat: fix overflow for large capacity partition",
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"x_generator": {
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"adp": [
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-17T19:08:47.689529Z",
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"id": "CVE-2022-48665",
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"options": [
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{
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"Exploitation": "none"
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{
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"title": "CISA ADP Vulnrichment",
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"dateUpdated": "2024-08-03T15:17:55.708Z"
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