321 lines
16 KiB
JSON
321 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-2024-56619",
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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": "2024-12-27T14:03:06.016Z",
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"datePublished": "2024-12-27T14:51:23.516Z",
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"dateUpdated": "2026-08-05T11:45:29.225Z"
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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": "2026-08-05T11:45:29.225Z"
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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\nnilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()\n\nSyzbot reported that when searching for records in a directory where the\ninode's i_size is corrupted and has a large value, memory access outside\nthe folio/page range may occur, or a use-after-free bug may be detected if\nKASAN is enabled.\n\nThis is because nilfs_last_byte(), which is called by nilfs_find_entry()\nand others to calculate the number of valid bytes of directory data in a\npage from i_size and the page index, loses the upper 32 bits of the 64-bit\nsize information due to an inappropriate type of local variable to which\nthe i_size value is assigned.\n\nThis caused a large byte offset value due to underflow in the end address\ncalculation in the calling nilfs_find_entry(), resulting in memory access\nthat exceeds the folio/page size.\n\nFix this issue by changing the type of the local variable causing the bit\nloss from \"unsigned int\" to \"u64\". The return value of nilfs_last_byte()\nis also of type \"unsigned int\", but it is truncated so as not to exceed\nPAGE_SIZE and no bit loss occurs, so no change is required."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 vulnerability is triggered through local filesystem operations (lookup, unlink, rename, getdents) on a mounted nilfs2 image with a corrupted directory i_size; no network protocol handler is involved.\nAC:L - The truncation and subsequent unsigned underflow are fully deterministic once the crafted i_size is present — a single lookup or readdir on the directory reliably walks past the folio, with no race or unpredictable precondition.\nPR:L - An unprivileged local user can supply and mount a crafted nilfs2 image via removable-media automount (udisks2) and then trigger the OOB with ordinary directory operations; no elevated capability is needed for the triggering syscalls.\nUI:N - Once the attacker-controlled filesystem is mounted, the attacker triggers the flaw entirely on their own with a lookup/readdir/unlink; no separate victim action is required.\nS:U - The out-of-bounds access and its consequences remain within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - nilfs_readdir() emits names and inode numbers read from out-of-bounds kernel memory directly to userspace via dir_emit(), giving a repeatable kernel heap disclosure primitive.\nI:H - A name match in out-of-bounds memory lets nilfs_delete_entry() write dir->inode = 0 and pde->rec_len at an attacker-groomable location outside the folio, an out-of-bounds write usable for control-flow corruption.\nA:H - The unbounded ~4 GB scan limit causes access past the folio into unmapped memory, producing a kernel oops/panic (and KASAN use-after-free reports), as observed by syzbot."
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}
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]
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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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"fs/nilfs2/dir.c"
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],
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"versions": [
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "09d6d05579fd46e61abf6e457bb100ff11f3a9d3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "e3732102a9d638d8627d14fdf7b208462f0520e0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "48eb6e7404948032bbe811c5affbe39f6b316951",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "5af8366625182f01f6d8465c9a3210574673af57",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "c3afea07477baccdbdec4483f8d5e59d42a3f67f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "31f7b57a77d4c82a34ddcb6ff35b5aa577ef153e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2ba466d74ed74f073257f86e61519cb8f8f46184",
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"lessThan": "985ebec4ab0a28bb5910c3b1481a40fbf7f9e61d",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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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/nilfs2/dir.c"
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],
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"versions": [
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{
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"version": "2.6.30",
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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": "2.6.30",
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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": "5.4.287",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.231",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.174",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.120",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.66",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.5",
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"lessThanOrEqual": "6.12.*",
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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": "6.13",
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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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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.30",
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"versionEndExcluding": "5.4.287"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/09d6d05579fd46e61abf6e457bb100ff11f3a9d3"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3732102a9d638d8627d14fdf7b208462f0520e0"
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},
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{
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"url": "https://git.kernel.org/stable/c/48eb6e7404948032bbe811c5affbe39f6b316951"
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},
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{
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"url": "https://git.kernel.org/stable/c/5af8366625182f01f6d8465c9a3210574673af57"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3afea07477baccdbdec4483f8d5e59d42a3f67f"
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},
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{
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"url": "https://git.kernel.org/stable/c/31f7b57a77d4c82a34ddcb6ff35b5aa577ef153e"
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},
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{
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"url": "https://git.kernel.org/stable/c/985ebec4ab0a28bb5910c3b1481a40fbf7f9e61d"
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}
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],
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"title": "nilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-56619",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-02-11T15:41:59.486282Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-02-11T15:45:22.383Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T20:51:08.191Z"
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}
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}
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]
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}
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} |