170 lines
8.7 KiB
JSON
170 lines
8.7 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-2026-45892",
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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": "2026-05-13T15:03:33.083Z",
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"datePublished": "2026-05-27T12:17:03.175Z",
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"dateUpdated": "2026-11-06T15:53:11.239Z"
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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": "2026-05-30T10:41:42.703Z"
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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: drop extent cache after doing PARTIAL_VALID1 zeroout\n\nWhen splitting an unwritten extent in the middle and converting it to\ninitialized in ext4_split_extent() with the EXT4_EXT_MAY_ZEROOUT and\nEXT4_EXT_DATA_VALID2 flags set, it could leave a stale unwritten extent.\n\nAssume we have an unwritten file and buffered write in the middle of it\nwithout dioread_nolock enabled, it will allocate blocks as written\nextent.\n\n 0 A B N\n [UUUUUUUUUUUU] on-disk extent U: unwritten extent\n [UUUUUUUUUUUU] extent status tree\n [--DDDDDDDD--] D: valid data\n |<- ->| ----> this range needs to be initialized\n\next4_split_extent() first try to split this extent at B with\nEXT4_EXT_DATA_PARTIAL_VALID1 and EXT4_EXT_MAY_ZEROOUT flag set, but\next4_split_extent_at() failed to split this extent due to temporary lack\nof space. It zeroout B to N and leave the entire extent as unwritten.\n\n 0 A B N\n [UUUUUUUUUUUU] on-disk extent\n [UUUUUUUUUUUU] extent status tree\n [--DDDDDDDDZZ] Z: zeroed data\n\next4_split_extent() then try to split this extent at A with\nEXT4_EXT_DATA_VALID2 flag set. This time, it split successfully and\nleave an written extent from A to N.\n\n 0 A B N\n [UUWWWWWWWWWW] on-disk extent W: written extent\n [UUUUUUUUUUUU] extent status tree\n [--DDDDDDDDZZ]\n\nFinally ext4_map_create_blocks() only insert extent A to B to the extent\nstatus tree, and leave an stale unwritten extent in the status tree.\n\n 0 A B N\n [UUWWWWWWWWWW] on-disk extent W: written extent\n [UUWWWWWWWWUU] extent status tree\n [--DDDDDDDDZZ]\n\nFix this issue by always cached extent status entry after zeroing out\nthe second part."
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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/extents.c"
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],
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"versions": [
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{
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"version": "ddf854e59166533b0f46ba32cd6cd9aca3197d1b",
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"lessThan": "28db4bfc6f82fd20e2aadb7fc162244109a4eb31",
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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": "58ddae5d77b1db3a27b891c75a8fa120239ac092",
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"lessThan": "f0931a5c17005a0c4fc35bd1a001245effc3354b",
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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": "d17857b4fb9ba5745b59be0ef38fd532991fccbf",
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"lessThan": "d8ee559fccdef713f058cfe5f2c03dc9b18be3b1",
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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": "d67c8ecf3d8fda9b8ef80e6f665d84b6d6ac9d88",
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"lessThan": "c2ee51d684adca7645e4aa74adca13f6750390bc",
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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": "7015fcf473796e1d2d876f241bd9e0c36f3d4eef",
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"lessThan": "a1b962a821e7a52d48212ae269b45808b4411267",
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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": "1bf6974822d1dba86cf11b5f05498581cf3488a2",
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"lessThan": "6d882ea3b0931b43530d44149b79fcd4ffc13030",
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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": "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/extents.c"
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],
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"versions": [
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{
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"version": "6.1.167",
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"lessThan": "6.1.168",
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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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"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": "6.1.167",
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"versionEndExcluding": "6.1.168"
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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/28db4bfc6f82fd20e2aadb7fc162244109a4eb31"
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},
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{
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"url": "https://git.kernel.org/stable/c/f0931a5c17005a0c4fc35bd1a001245effc3354b"
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},
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{
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"url": "https://git.kernel.org/stable/c/d8ee559fccdef713f058cfe5f2c03dc9b18be3b1"
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},
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{
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"url": "https://git.kernel.org/stable/c/c2ee51d684adca7645e4aa74adca13f6750390bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/a1b962a821e7a52d48212ae269b45808b4411267"
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},
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{
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"url": "https://git.kernel.org/stable/c/6d882ea3b0931b43530d44149b79fcd4ffc13030"
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}
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],
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"title": "ext4: drop extent cache after doing PARTIAL_VALID1 zeroout",
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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-2026-45892",
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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": "2026-11-06T15:43:46.849985Z"
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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": "2026-11-06T15:53:11.239Z"
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}
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}
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]
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}
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} |