298 lines
16 KiB
JSON
298 lines
16 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-2026-74557",
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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": "2026-08-15T05:44:03.916Z",
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"datePublished": "2026-08-15T12:28:01.988Z",
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"dateUpdated": "2026-10-16T19:05:55.724Z"
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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": "2026-08-19T16:38:59.951Z"
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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\nscsi: libiscsi: Fix stale-data leak into the SCSI sense buffer\n\niscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the\ntarget-supplied data segment. The segment carries a 2-byte sense length\nfollowed by the sense bytes, so it must hold 2 + senselen bytes, but the\nbounds check only requires datalen >= senselen:\n\n\tsenselen = get_unaligned_be16(data);\n\tif (datalen < senselen)\n\t\tgoto invalid_datalen;\n\tmemcpy(sc->sense_buffer, data + 2,\n\t min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE));\n\nA target that returns a SCSI Response whose datalen equals senselen\n(with senselen <= SCSI_SENSE_BUFFERSIZE) makes the memcpy() from data +\n2 read up to two bytes past the received data. Those bytes are stale\nconn->data contents and end up in the command's sense buffer, which is\nreturned to userspace.\n\nAccount for the 2-byte sense length prefix in the check."
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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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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"baseScore": 7.5,
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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:N - A remote malicious or compromised iSCSI target can trigger the bug by sending a crafted SCSI Command Response over the standard iSCSI/TCP session to a Linux kernel initiator, with no local access required on the victim host.\nAC:L - The attacker fully controls the response PDU fields (datalen, sense length, CHECK_CONDITION status) and can reliably set datalen equal to senselen so the flawed bounds check passes and stale conn->data bytes are copied into the sense buffer.\nPR:N - Exploitation requires only the ability to act as the iSCSI target on the network; the attacker needs no local account, capabilities, or privileges on the victim system initiating the connection.\nUI:N - Once an iSCSI session exists, the leak is triggered automatically on SCSI command responses with no further victim action; the attacker does not rely on a user opening a file, clicking a link, or performing any interactive step at exploit time.\nS:U - The flaw discloses kernel memory contents into a SCSI sense buffer returned within the same host security domain; it does not cross VM, hypervisor, or IOMMU boundaries and is a standard kernel-to-userspace information leak.\nC:H - The out-of-bounds memcpy reads up to two bytes per response from stale conn->data kernel heap memory into sc->sense_buffer, which is copied to userspace via SCSI completion, ioctl, and BSG paths, enabling repeated kernel information disclosure.\nI:N - The vulnerability is a read-only out-of-bounds memcpy from the receive buffer into the sense buffer; it does not corrupt kernel structures, overwrite memory, or provide a write or code-execution primitive.\nA:N - The bug causes no kernel panic, oops, or hang; invalid responses are handled gracefully and exploitation only leaks data into the sense buffer without disrupting system availability."
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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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"drivers/scsi/libiscsi.c"
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],
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"versions": [
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{
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"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "812f1ae95b22419422972748f173b0916ee4d621",
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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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "fef6167e8149896cd81bea333fd51b1c91239149",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "baa04572673125e4d5bc309b4077d1cb46cc78d1",
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"status": "affected",
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"lessThan": "7567f06abdefb1caf2d836107c4d08c5185c650e",
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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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "60499924faf4ef97e84228c20515218ef121facf",
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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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "3ef209ca0b4b68c75e9a814d90cc916026b5a6ac",
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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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "1f07a897d43c63e6c9458bf77450defef39b5833",
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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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
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"lessThan": "98b87885de4b7f605533a2860685f5689fce8e82",
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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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"drivers/scsi/libiscsi.c"
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],
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"versions": [
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{
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"version": "2.6.18",
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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": "2.6.18",
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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": "5.10.265",
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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": "5.15.216",
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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": "6.1.183",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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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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{
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.18",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/812f1ae95b22419422972748f173b0916ee4d621"
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},
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{
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"url": "https://git.kernel.org/stable/c/fef6167e8149896cd81bea333fd51b1c91239149"
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},
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{
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"url": "https://git.kernel.org/stable/c/baa04572673125e4d5bc309b4077d1cb46cc78d1"
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},
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{
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"url": "https://git.kernel.org/stable/c/7567f06abdefb1caf2d836107c4d08c5185c650e"
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},
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{
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"url": "https://git.kernel.org/stable/c/60499924faf4ef97e84228c20515218ef121facf"
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},
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{
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"url": "https://git.kernel.org/stable/c/3ef209ca0b4b68c75e9a814d90cc916026b5a6ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f07a897d43c63e6c9458bf77450defef39b5833"
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},
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{
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"url": "https://git.kernel.org/stable/c/98b87885de4b7f605533a2860685f5689fce8e82"
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}
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],
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"title": "scsi: libiscsi: Fix stale-data leak into the SCSI sense buffer",
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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-2026-74557",
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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": "yes"
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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": "2026-10-16T19:00:09.303445Z"
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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": "2026-10-16T19:05:55.724Z"
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}
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}
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]
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}
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} |