205 lines
9.1 KiB
JSON
205 lines
9.1 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-2021-47119",
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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": "2024-03-04T18:12:48.838Z",
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"datePublished": "2024-03-15T20:14:25.901Z",
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"dateUpdated": "2026-05-11T13:48:25.026Z"
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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": "2026-05-11T13:48:25.026Z"
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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: fix memory leak in ext4_fill_super\n\nBuffer head references must be released before calling kill_bdev();\notherwise the buffer head (and its page referenced by b_data) will not\nbe freed by kill_bdev, and subsequently that bh will be leaked.\n\nIf blocksizes differ, sb_set_blocksize() will kill current buffers and\npage cache by using kill_bdev(). And then super block will be reread\nagain but using correct blocksize this time. sb_set_blocksize() didn't\nfully free superblock page and buffer head, and being busy, they were\nnot freed and instead leaked.\n\nThis can easily be reproduced by calling an infinite loop of:\n\n systemctl start <ext4_on_lvm>.mount, and\n systemctl stop <ext4_on_lvm>.mount\n\n... since systemd creates a cgroup for each slice which it mounts, and\nthe bh leak get amplified by a dying memory cgroup that also never\ngets freed, and memory consumption is much more easily noticed."
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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/super.c"
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],
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"versions": [
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{
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"version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
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"lessThan": "01d349a481f0591230300a9171330136f9159bcd",
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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": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
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"lessThan": "1385b23396d511d5233b8b921ac3058b3f86a5e1",
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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": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
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"lessThan": "afd09b617db3786b6ef3dc43e28fe728cfea84df",
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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/ext4/super.c"
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],
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"versions": [
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{
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"version": "2.6.19",
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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": "2.6.19",
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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": "5.10.43",
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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": "5.12.10",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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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{
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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": "2.6.19",
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"versionEndExcluding": "5.10.43"
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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": "2.6.19",
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"versionEndExcluding": "5.12.10"
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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": "2.6.19",
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"versionEndExcluding": "5.13"
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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/01d349a481f0591230300a9171330136f9159bcd"
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},
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{
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"url": "https://git.kernel.org/stable/c/1385b23396d511d5233b8b921ac3058b3f86a5e1"
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},
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{
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"url": "https://git.kernel.org/stable/c/afd09b617db3786b6ef3dc43e28fe728cfea84df"
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}
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],
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"title": "ext4: fix memory leak in ext4_fill_super",
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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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"timestamp": "2024-07-23T13:37:32.763549Z",
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"id": "CVE-2021-47119",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2024-07-23T13:37:45.432Z"
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}
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},
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{
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"providerMetadata": {
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T05:24:39.956Z"
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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/01d349a481f0591230300a9171330136f9159bcd",
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} |