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-2023-53676",
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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": "2025-10-07T15:16:59.664Z",
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"datePublished": "2025-10-07T15:21:31.757Z",
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"dateUpdated": "2026-10-15T21:41:33.205Z"
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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": "2026-08-05T09:15:29.713Z"
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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: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()\n\nThe function lio_target_nacl_info_show() uses sprintf() in a loop to print\ndetails for every iSCSI connection in a session without checking for the\nbuffer length. With enough iSCSI connections it's possible to overflow the\nbuffer provided by configfs and corrupt the memory.\n\nThis patch replaces sprintf() with sysfs_emit_at() that checks for buffer\nboundries."
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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:R/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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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:N - The attacker-controlled state that causes the overflow — the number of MC/S connections on a session, plus the InitiatorName/InitiatorAlias/CID/peer-address bytes written OOB — is delivered entirely over TCP/3260 to the network-bound LIO iSCSI target from an arbitrary number of network hops away. This is the stored-payload pattern: the payload is planted remotely at the iSCSI protocol level and rendered later.\nAC:L - On an MC/S-enabled target (the deployment this was reported against) the attacker deterministically opens the ~25+ connections needed to exceed the 4096-byte page; no race, no memory-layout guess, no unpredictable condition is involved. Each additional login reliably extends the overflow.\nPR:N - iSCSI targets are very commonly run with CHAP disabled (`authentication=0`, or demo mode), and the initiator IQN matching an ACL is merely a string the peer asserts in the login PDU, so an unauthenticated remote peer can establish the multi-connection session. Even the connection-count growth occurs during login processing before any real credential check in that configuration.\nUI:R - The overflow executes when the world-readable configfs attribute `acls/<iqn>/info` is read — by an administrator, targetcli/rtslib, or a monitoring agent — which the remote attacker cannot initiate. That read is routine on managed storage nodes but is still a separate party's action.\nS:U - The corruption is kernel memory overwritten by kernel code within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Unbounded page-overflow with attacker-influenced content into adjacent buddy-allocator pages is a memory-corruption primitive that can be steered into slab objects, pointers, or page metadata and leveraged for arbitrary kernel memory disclosure.\nI:H - This is an out-of-bounds write of attacker-controlled length (scaling with connection count, up to megabytes) with partly attacker-chosen bytes (CIDs, peer addresses, StatSN) past the end of a kernel page, giving a strong write primitive suitable for control-flow hijack.\nA:H - Overwriting arbitrary adjacent kernel pages while holding `conn_lock` and `nacl_sess_lock` reliably corrupts unrelated kernel state and causes oops/panic; the attacker can repeat it on every read."
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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/target/iscsi/iscsi_target_configfs.c"
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],
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"versions": [
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{
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"version": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "df349e84c2cb0dd05d98c8e1189c26ab4b116083",
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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": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "114b44dddea1f8f99576de3c0e6e9059012002fc",
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"status": "affected",
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},
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{
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"lessThan": "bbe3ff47bf09db8956bc2eeb49d2d514d256ad2a",
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"status": "affected",
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},
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"lessThan": "5353df78c22623b42a71d51226d228a8413097e2",
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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": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "4738bf8b2d3635c2944b81b2a84d97b8c8b0978d",
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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": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "0cac6cbb9908309352a5d30c1876882771d3da50",
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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": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "801f287c93ff95582b0a2d2163f12870a2f076d4",
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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/target/iscsi/iscsi_target_configfs.c"
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],
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"versions": [
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{
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"version": "3.1",
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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": "3.1",
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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": "4.14.326",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.295",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.257",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.197",
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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": "5.15.133",
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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": "6.1.55",
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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": "6.5.5",
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"lessThanOrEqual": "6.5.*",
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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",
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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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"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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.1",
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"versionEndExcluding": "4.14.326"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/df349e84c2cb0dd05d98c8e1189c26ab4b116083"
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},
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{
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"url": "https://git.kernel.org/stable/c/114b44dddea1f8f99576de3c0e6e9059012002fc"
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},
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{
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"url": "https://git.kernel.org/stable/c/2cbe6a88fbdd6e8aeab358eef61472e2de43d6f6"
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},
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{
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"url": "https://git.kernel.org/stable/c/bbe3ff47bf09db8956bc2eeb49d2d514d256ad2a"
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},
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{
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"url": "https://git.kernel.org/stable/c/5353df78c22623b42a71d51226d228a8413097e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/4738bf8b2d3635c2944b81b2a84d97b8c8b0978d"
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},
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{
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"url": "https://git.kernel.org/stable/c/0cac6cbb9908309352a5d30c1876882771d3da50"
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},
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{
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"url": "https://git.kernel.org/stable/c/801f287c93ff95582b0a2d2163f12870a2f076d4"
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}
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],
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"title": "scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()",
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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-2023-53676",
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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": "2026-10-15T21:36:24.101967Z"
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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": "2026-10-15T21:41:33.205Z"
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}
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}
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]
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}
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} |