273 lines
15 KiB
JSON
273 lines
15 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-2024-47690",
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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": "2024-09-30T16:00:12.942Z",
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"datePublished": "2024-10-21T11:53:29.870Z",
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"dateUpdated": "2026-08-05T11:39:27.223Z"
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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": "2026-08-05T11:39:27.223Z"
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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\nf2fs: get rid of online repaire on corrupted directory\n\nsyzbot reports a f2fs bug as below:\n\nkernel BUG at fs/f2fs/inode.c:896!\nRIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896\nCall Trace:\n evict+0x532/0x950 fs/inode.c:704\n dispose_list fs/inode.c:747 [inline]\n evict_inodes+0x5f9/0x690 fs/inode.c:797\n generic_shutdown_super+0x9d/0x2d0 fs/super.c:627\n kill_block_super+0x44/0x90 fs/super.c:1696\n kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4898\n deactivate_locked_super+0xc4/0x130 fs/super.c:473\n cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373\n task_work_run+0x24f/0x310 kernel/task_work.c:228\n ptrace_notify+0x2d2/0x380 kernel/signal.c:2402\n ptrace_report_syscall include/linux/ptrace.h:415 [inline]\n ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]\n syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173\n syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]\n __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]\n syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218\n do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896\n\nOnline repaire on corrupted directory in f2fs_lookup() can generate\ndirty data/meta while racing w/ readonly remount, it may leave dirty\ninode after filesystem becomes readonly, however, checkpoint() will\nskips flushing dirty inode in a state of readonly mode, result in\nabove panic.\n\nLet's get rid of online repaire in f2fs_lookup(), and leave the work\nto fsck.f2fs."
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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 reached through local filesystem operations — mounting an f2fs image, ordinary path lookup syscalls, and a remount — with no network protocol involved. Even in the removable-media/automount scenario the triggering actions are local syscalls, and Local scores higher than Physical.\nAC:L - The attacker controls both sides of the race (a lookup loop against `mount -o remount,ro`) and can repeat it indefinitely until the window is hit; the `f2fs_readonly()` check in `__recover_dot_dentries()` is checked once with no locking against the remount. Setting the on-disk `F2FS_INLINE_DOTS` bit is trivial and requires no special conditions.\nPR:L - Reaching `f2fs_lookup()` and thus `__recover_dot_dentries()` requires only an unprivileged local account with search access to the mount; the flag arrives from disk via a crafted image or a legacy mkfs.f2fs volume that an automount daemon (Android vold, udisks2) mounts on the attacker's behalf. No capability check exists anywhere on the lookup path.\nUI:N - No victim action is needed — the attacker performs the lookups, remount and unmount itself, and in the removable-media case the automount daemon mounts the volume without any user interaction.\nS:U - The corruption and the resulting panic/use-after-free are confined to the kernel's own memory and the f2fs superblock structures; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - After the WARN path leaves the evicted inode linked in `sbi->inode_list[DIRTY_META]`, `f2fs_sync_inode_meta()` reads a freed `f2fs_inode_info` via `list_first_entry()` and `igrab()`, giving a use-after-free read of reclaimed slab memory that can be heap-sprayed to disclose kernel data.\nI:H - The same dangling `gdirty_list` entry yields UAF writes through `list_del_init()` in `f2fs_inode_synced()` and `f2fs_update_inode_page()` operating on a reclaimed object, a well-known primitive for heap-spray-based control-flow hijack; the bug additionally leaves persistent on-disk metadata inconsistency requiring fsck.\nA:H - The reported failure is an outright kernel panic at `fs/f2fs/inode.c:896` (`BUG_ON` under CONFIG_F2FS_CHECK_FS, or WARN plus a subsequent use-after-free oops otherwise), triggered on unmount and reproducible on demand."
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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/f2fs/f2fs.h",
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"fs/f2fs/namei.c",
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"include/linux/f2fs_fs.h"
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],
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"versions": [
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{
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"version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "e8d64f598eeb079c42a52deaa3a91312c736a49d",
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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": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "f4746f2d79507f65cfbde11d3c39ee8338aa50af",
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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": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "f9ce2f550d53d044ecfb5ce996406cf42cd6b84d",
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"status": "affected",
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"versionType": "git"
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{
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"version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "8be95cd607478d85fa4626e86f811e785905bcbf",
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"status": "affected",
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"versionType": "git"
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{
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"version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "bcefd0b0611f35b560d0a7281d87529fbe7a1e32",
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"status": "affected",
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},
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{
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"version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
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"lessThan": "884ee6dc85b959bc152f15bca80c30f06069e6c4",
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"status": "affected",
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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/f2fs/f2fs.h",
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"fs/f2fs/namei.c",
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"include/linux/f2fs_fs.h"
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],
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"versions": [
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{
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"version": "4.1",
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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": "4.1",
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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": "5.15.168",
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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": "6.1.113",
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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": "6.6.54",
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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": "6.10.13",
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"lessThanOrEqual": "6.10.*",
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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": "6.11.2",
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"lessThanOrEqual": "6.11.*",
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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",
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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": "4.1",
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"versionEndExcluding": "5.15.168"
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},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e8d64f598eeb079c42a52deaa3a91312c736a49d"
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},
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{
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"url": "https://git.kernel.org/stable/c/f4746f2d79507f65cfbde11d3c39ee8338aa50af"
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},
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{
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"url": "https://git.kernel.org/stable/c/f9ce2f550d53d044ecfb5ce996406cf42cd6b84d"
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},
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{
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"url": "https://git.kernel.org/stable/c/8be95cd607478d85fa4626e86f811e785905bcbf"
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},
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{
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"url": "https://git.kernel.org/stable/c/bcefd0b0611f35b560d0a7281d87529fbe7a1e32"
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},
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{
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"url": "https://git.kernel.org/stable/c/884ee6dc85b959bc152f15bca80c30f06069e6c4"
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}
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],
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"title": "f2fs: get rid of online repaire on corrupted directory",
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-47690",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-10-21T13:06:03.889382Z"
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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": "2024-10-21T13:14:15.315Z"
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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/2025/01/msg00001.html"
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}
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"dateUpdated": "2025-11-03T22:20:55.203Z"
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}
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]
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}
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} |