235 lines
12 KiB
JSON
235 lines
12 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-2022-50328",
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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": "2025-09-15T14:18:36.815Z",
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"datePublished": "2025-09-15T14:49:30.483Z",
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"dateUpdated": "2026-10-15T21:31:20.094Z"
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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": "2026-08-05T08:58:12.098Z"
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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\njbd2: fix potential use-after-free in jbd2_fc_wait_bufs\n\nIn 'jbd2_fc_wait_bufs' use 'bh' after put buffer head reference count\nwhich may lead to use-after-free.\nSo judge buffer if uptodate before put buffer head reference count."
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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 bug is in jbd2_fc_wait_bufs on the ext4 fast-commit path, reached via local syscalls such as fsync/fdatasync/fallocate(O_SYNC) on an ext4 filesystem; it does not process network packets or remote protocol data.\nAC:L - An unprivileged attacker can reliably drive the vulnerable path by dirtying and fsyncing files on a fast-commit-enabled ext4 mount, and can apply memory pressure so the buffer_head dropped by put_bh is reclaimed before buffer_uptodate; both sides of the race are attacker-influenced.\nPR:L - Any unprivileged local user with write access to a regular file on a mounted ext4 filesystem with the fast_commit feature can trigger ext4_fc_commit → jbd2_fc_wait_bufs; no capabilities or root are required.\nUI:N - Exploitation uses only the attacker's own file writes and fsync; no separate victim action such as mounting a volume or opening a crafted file is required.\nS:U - This is a standard in-kernel heap use-after-free that can escalate privileges within the same kernel authority, not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Use-after-free of the buffer_head after put_bh lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure primitives per UAF exploitation.\nI:H - UAF of the buffer_head enables heap spraying and write primitives for control-flow hijacking, and a corrupted buffer_uptodate result can also cause failed journal IO to be treated as success.\nA:H - Accessing the freed buffer_head can oops/panic the kernel even without full exploitation, so availability impact is high."
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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/jbd2/journal.c"
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],
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"versions": [
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{
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"version": "ff780b91efe901b8eecd8114785abae5341820ad",
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"lessThan": "1d4d16daec2a6689b6d3fbfc7d2078643adc6619",
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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": "ff780b91efe901b8eecd8114785abae5341820ad",
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"lessThan": "d11d2ded293976a1a0d9d9471827a44dc9e3c63f",
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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": "ff780b91efe901b8eecd8114785abae5341820ad",
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"lessThan": "2e6d9f381c1ed844531a577783fc352de7a44c8a",
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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": "ff780b91efe901b8eecd8114785abae5341820ad",
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"lessThan": "effd9b3c029ecdd853a11933dcf857f5a7ca8c3d",
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"status": "affected",
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},
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{
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"version": "ff780b91efe901b8eecd8114785abae5341820ad",
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"lessThan": "243d1a5d505d0b0460c9af0ad56ed4a56ef0bebd",
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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/jbd2/journal.c"
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],
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"versions": [
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{
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"version": "5.10",
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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": "5.10",
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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": "5.10.150",
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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": "5.15.75",
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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": "5.19.17",
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"lessThanOrEqual": "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": "6.0.3",
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"lessThanOrEqual": "6.0.*",
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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",
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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",
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"versionEndExcluding": "5.10.150"
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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": "5.10",
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"versionEndExcluding": "5.15.75"
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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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"versionEndExcluding": "5.19.17"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.0.3"
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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": "5.10",
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"versionEndExcluding": "6.1"
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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/1d4d16daec2a6689b6d3fbfc7d2078643adc6619"
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},
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{
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"url": "https://git.kernel.org/stable/c/d11d2ded293976a1a0d9d9471827a44dc9e3c63f"
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},
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{
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"url": "https://git.kernel.org/stable/c/2e6d9f381c1ed844531a577783fc352de7a44c8a"
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},
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{
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"url": "https://git.kernel.org/stable/c/effd9b3c029ecdd853a11933dcf857f5a7ca8c3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/243d1a5d505d0b0460c9af0ad56ed4a56ef0bebd"
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}
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],
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"title": "jbd2: fix potential use-after-free in jbd2_fc_wait_bufs",
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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-2022-50328",
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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": "2026-10-15T21:30:57.434456Z"
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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": "2026-10-15T21:31:20.094Z"
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}
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}
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]
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}
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} |