314 lines
16 KiB
JSON
314 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-26601",
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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": "2024-02-19T14:20:24.128Z",
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"datePublished": "2024-02-24T14:56:56.324Z",
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"dateUpdated": "2026-08-05T11:26:11.866Z"
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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": "2026-08-05T11:26:11.866Z"
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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\next4: regenerate buddy after block freeing failed if under fc replay\n\nThis mostly reverts commit 6bd97bf273bd (\"ext4: remove redundant\nmb_regenerate_buddy()\") and reintroduces mb_regenerate_buddy(). Based on\ncode in mb_free_blocks(), fast commit replay can end up marking as free\nblocks that are already marked as such. This causes corruption of the\nbuddy bitmap so we need to regenerate it in that case."
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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 vulnerable branch is only entered while `EXT4_FC_REPLAY` is set, i.e. during fast-commit journal recovery performed by the `mount()` syscall on a local block device or loop-mounted image. There is no network-facing consumer of this path.\nAC:L - The attacker fully authors the filesystem image — fast-commit DEL_RANGE tags, extent trees and block bitmaps — so arranging a free of an already-free block is deterministic, with no race or memory-layout condition outside their control.\nPR:L - An unprivileged local user supplies the crafted ext4 image via removable media or a loop/user-mountable device; udisks2-style automounters and autofs perform the mount, and mounting in a user namespace also reaches this code without real root.\nUI:N - Automount daemons mount attacker-supplied removable media without any action by another user, and the fc replay runs unconditionally during that mount.\nS:U - The corruption is confined to ext4's in-kernel allocator metadata and the mounted filesystem; it stays within the kernel's own security authority with no VM/IOMMU boundary crossed.\nC:H - A group left with an inflated `bb_free` and a stale buddy is not quarantined, so mballoc can hand the attacker blocks whose true state it has lost track of, exposing residual on-disk contents of other files; the inconsistent metadata is also read back out of bounds of what the bitmap actually describes.\nI:H - The block allocator's authoritative accounting is left corrupt and the group stays in service, so subsequent allocations write through aliased/incorrectly-tracked blocks, corrupting other files' data and on-disk filesystem metadata.\nA:H - The desynchronized buddy reaches `BUG_ON`s in `mb_mark_used()` and `MB_CHECK_ASSERT()` in `mb_check_buddy()`, and the `ext4_grp_locked_error()` paths panic outright because the crafted image's `s_errors` field can select `errors=panic`; at minimum the filesystem is forced read-only."
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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/ext4/mballoc.c"
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],
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"versions": [
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{
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"version": "0983142c5f17a62055ec851372273c3bc77e4788",
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"lessThan": "94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a",
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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": "6bd97bf273bdb4944904e57480f6545bca48ad77",
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"lessThan": "c1317822e2de80e78f137d3a2d99febab1b80326",
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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": "6bd97bf273bdb4944904e57480f6545bca48ad77",
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"lessThan": "78327acd4cdc4a1601af718b781eece577b6b7d4",
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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": "6bd97bf273bdb4944904e57480f6545bca48ad77",
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"lessThan": "ea42d6cffb0dd27a417f410b9d0011e9859328cb",
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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": "6bd97bf273bdb4944904e57480f6545bca48ad77",
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"lessThan": "6b0d48647935e4b8c7b75d1eccb9043fcd4ee581",
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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": "6bd97bf273bdb4944904e57480f6545bca48ad77",
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"lessThan": "c9b528c35795b711331ed36dc3dbee90d5812d4e",
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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": "5.10.181",
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"lessThan": "5.10.211",
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"status": "affected",
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"versionType": "semver"
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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/ext4/mballoc.c"
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],
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"versions": [
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{
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"version": "5.11",
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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": "5.11",
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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": "5.10.211",
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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": "5.15.150",
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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": "6.1.78",
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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": "6.6.17",
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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": "6.7.5",
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"lessThanOrEqual": "6.7.*",
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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": "6.8",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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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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"versionStartIncluding": "5.10.181",
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"versionEndExcluding": "5.10.211"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "5.15.150"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.1.78"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.6.17"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.7.5"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.8"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a"
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},
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{
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"url": "https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326"
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},
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{
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"url": "https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb"
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},
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{
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"url": "https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e"
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}
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],
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"title": "ext4: regenerate buddy after block freeing failed if under fc replay",
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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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"title": "CISA ADP Vulnrichment",
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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-2024-26601",
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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": "2024-03-01T15:48:58.021731Z"
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}
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}
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}
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],
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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": "2024-06-04T17:48:55.950Z"
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}
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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": "2024-08-02T00:07:19.651Z"
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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://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a",
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"tags": [
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"url": "https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326",
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
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},
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"dataVersion": "5.2"
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} |