298 lines
15 KiB
JSON
298 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-2026-74349",
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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": "2026-08-15T05:44:03.886Z",
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"datePublished": "2026-08-15T05:58:36.630Z",
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"dateUpdated": "2026-10-16T18:55:34.720Z"
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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": "2026-08-17T05:46:12.774Z"
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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\nocfs2: reject FITRIM ranges shorter than a cluster\n\nocfs2_trim_mainbm() trims the global bitmap in cluster units, but its\ntoo-short range validation only checks sb->s_blocksize.\n\nOn filesystems with a cluster size larger than the block size, a FITRIM\nrange that is at least one block but shorter than one cluster is accepted\nand shifted down to len == 0. The later start + len - 1 and len -= ... \narithmetic then underflows and can drive trimming past the requested\nrange.\n\nReject ranges shorter than s_clustersize instead. That preserves the\nexisting -EINVAL behavior for requests that cannot discard even one\nallocation unit and keeps zero-cluster trims out of the group walk."
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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:N/I:H/A:H",
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"baseScore": 7.1,
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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 - Exploitation requires a local FITRIM ioctl on an open OCFS2 mount (typically via fstrim or ioctl on the mountpoint); there is no network-facing OCFS2 handler or remote protocol path to this code.\nAC:L - An attacker with the required privileges can reliably trigger the bug by supplying a FITRIM range at least one block long but shorter than one cluster, which is common when OCFS2 cluster size exceeds the 4K block size.\nPR:L - The FITRIM handler explicitly requires capable(CAP_SYS_ADMIN) before calling ocfs2_trim_fs(); per kernel CNA guidance this maps to Low because CAP_SYS_ADMIN can be held by root inside a user namespace.\nUI:N - No victim interaction is required; the privileged attacker directly issues the FITRIM ioctl with crafted range parameters to trigger the faulty trim logic.\nS:U - Impact is confined to erroneous discard/trim operations within the same privileged filesystem context on the affected host and shared storage; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The flaw causes incorrect discard of free clusters via sb_issue_discard and integer underflow in range arithmetic; it does not read kernel memory, leak pointers, or expose sensitive data to the attacker.\nI:H - Unsigned underflow can drive trimming far beyond the requested FITRIM range, issuing discard on extensive free-space regions on shared cluster storage and risking unintended loss or corruption of filesystem data integrity.\nA:H - Corrupted len/last_group values can cause prolonged iteration through cluster groups while holding the exclusive OCFS2 cluster-wide trim DLM lock, enabling severe denial of service or hang for the node and other cluster members."
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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/ocfs2/alloc.c"
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],
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"versions": [
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{
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"version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "d903d59c0315f59bdf0214b4f13d71c9feb2c45c",
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"status": "affected",
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},
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{
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"version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "441abb77222f155e8d931dbabb465466db01cfd7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"status": "affected",
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"lessThan": "346314bb0cc2fc52b50b73d6ecc62e0217455c2e",
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"status": "affected",
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},
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{
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"version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "06c0a0431b9856506fcd9b2c1b0c6136567d756d",
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"status": "affected",
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"versionType": "git"
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{
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"version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "3fa7139b5f42731a61f78c42433adae13f9adc21",
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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": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "2c13e02592b918be7725ab5965e01ef4e46c4b57",
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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": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
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"lessThan": "ca1afd88f5eaaff9168e1466e5401385edf59543",
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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/ocfs2/alloc.c"
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],
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"versions": [
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{
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"version": "3.14",
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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": "3.14",
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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": "5.10.261",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"operator": "OR",
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"cpeMatch": [
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7"
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},
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{
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"url": "https://git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd"
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},
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{
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"url": "https://git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e"
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},
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{
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"url": "https://git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d"
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},
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{
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"url": "https://git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21"
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},
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{
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"url": "https://git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543"
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}
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],
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"title": "ocfs2: reject FITRIM ranges shorter than a cluster",
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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-2026-74349",
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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": "2026-10-16T18:54:14.069402Z"
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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": "2026-10-16T18:55:34.720Z"
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}
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}
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]
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}
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} |