326 lines
18 KiB
JSON
326 lines
18 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-2026-72083",
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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": "2026-08-09T03:40:39.904Z",
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"datePublished": "2026-08-15T05:52:32.045Z",
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"dateUpdated": "2026-10-19T21:19:26.910Z"
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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": "2026-08-17T05:40:05.325Z"
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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: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE\n\ncore_scsi3_emulate_pro_register_and_move() maps the PERSISTENT RESERVE OUT\nparameter list with transport_kmap_data_sg() and parses the destination\nTransportID with target_parse_pr_out_transport_id(). For an iSCSI\nTransportID (FORMAT CODE 01b), iscsi_parse_pr_out_transport_id() returns\nthe ISID in iport_ptr as a raw pointer into that mapped buffer.\n\nThe function then unmaps the buffer with transport_kunmap_data_sg() before\ndereferencing iport_ptr in strcmp(), __core_scsi3_locate_pr_reg() and\ncore_scsi3_alloc_registration(). When the parameter list spans more than\none page (PARAMETER LIST LENGTH > 4096), transport_kmap_data_sg() uses\nvmap() and transport_kunmap_data_sg() does vunmap(), so the kernel virtual\naddress backing iport_ptr is torn down and every subsequent dereference is\na use-after-free read of the unmapped region.\n\nKeep the parameter list mapped until iport_ptr is no longer needed: drop\nthe early transport_kunmap_data_sg() and unmap once on the success path,\nright before returning. The error paths already unmap through the existing\n\"if (buf) transport_kunmap_data_sg(cmd)\" at the out: label, which now runs\non every post-map error exit because buf is no longer cleared early. Only\nreads of the mapping happen while spinlocks are held; the map and unmap\ncalls remain outside any lock. The sibling caller\ncore_scsi3_decode_spec_i_port() already uses the buffer before unmapping it\nand is left unchanged."
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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:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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 - On LIO/iSCSI storage servers and appliances, a remote initiator sends PERSISTENT_RESERVE_OUT with REGISTER AND MOVE over TCP (port 3260); iscsit_process_scsi_cmd()→target_execute_cmd()→target_scsi3_emulate_pr_out()→core_scsi3_emulate_pro_register_and_move() with no local access required.\nAC:L - The attacker fully controls the PR-OUT parameter list length (>4096 to force vmap/vunmap), iSCSI TransportID format 01b with ISID, and can establish prerequisite PR registration and reservation via prior SCSI commands on the same session; no uncontrollable race or layout dependency exists.\nPR:N - Exploitation requires only the ability to act as a network SCSI/iSCSI client with LUN access to an exported target; no Linux UID, capability, or init-namespace root on the storage server is needed—only standard iSCSI initiator connectivity (CHAP/ACL when configured).\nUI:N - Triggering is fully automated once an iSCSI session exists: the attacker issues scripted REGISTER, RESERVE, then REGISTER AND MOVE commands with a crafted >4 KiB parameter list; no victim mount, click, or other interactive action is required.\nS:U - The UAF corrupts kernel heap state inside the target-core PR handler on the storage host; impact stays within that kernel security domain and does not inherently cross VM, container, or IOMMU boundaries (standard host compromise, not escape).\nC:H - After vunmap(), iport_ptr aliases freed kernel virtual address space and is dereferenced in strcmp(), __core_scsi3_locate_pr_reg(), and snprintf() into pr_reg_isid; per kernel CVSS guidance, UAF reads enable arbitrary kernel memory disclosure when uncertain.\nI:H - UAF reads of attacker-influenced unmapped PR-OUT data drive strcmp-based registration matching and snprintf copies into persistent kernel pr_reg structures; memory corruption/UAF is scored High for integrity because it can be leveraged for control-flow or state manipulation.\nA:H - Dereferencing iport_ptr after transport_kunmap_data_sg() vunmap() on multi-page buffers causes immediate invalid kernel virtual address accesses (oops/panic) on every qualifying REGISTER AND MOVE; UAF availability impact is High per kernel guidance even before full exploit development."
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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/target_core_pr.c"
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],
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"versions": [
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{
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"version": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "7d56f5c868d92c9d504a34a3ea450bce481c7f63",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "59a2a5a37dc49a641ad6bc64aee34e5a61025ffd",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "9f8076cc73dfa6b10155978c160587e986b22169",
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"status": "affected",
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},
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{
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"version": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "a040004846f1fbe687f6ec76d9ccc27b4ead42e4",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "05b3e37433cf2eaf8867f1c16528aa347bb212ab",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "cb7bdae7fba404852ade34b0c1445fbaf3e54fbb",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "ef2ee18fec92088c7d8877baf7674e89389ccd66",
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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": "4949314c7283ea4f9ade182ca599583b89f7edd6",
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"lessThan": "fda6a1f3c3d7047b5ce5654487649c2daa738bfc",
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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": "d2227f84ba0e97906153ac83db13213fb2e3938d",
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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": "3.2.9",
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"lessThan": "3.3",
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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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"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/target_core_pr.c"
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],
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"versions": [
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{
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"version": "3.3",
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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": "3.3",
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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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{
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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": "3.3",
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"versionEndExcluding": "5.10.261"
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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/7d56f5c868d92c9d504a34a3ea450bce481c7f63"
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},
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{
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"url": "https://git.kernel.org/stable/c/59a2a5a37dc49a641ad6bc64aee34e5a61025ffd"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f8076cc73dfa6b10155978c160587e986b22169"
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},
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{
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"url": "https://git.kernel.org/stable/c/a040004846f1fbe687f6ec76d9ccc27b4ead42e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/05b3e37433cf2eaf8867f1c16528aa347bb212ab"
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},
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{
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"url": "https://git.kernel.org/stable/c/cb7bdae7fba404852ade34b0c1445fbaf3e54fbb"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef2ee18fec92088c7d8877baf7674e89389ccd66"
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},
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{
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"url": "https://git.kernel.org/stable/c/fda6a1f3c3d7047b5ce5654487649c2daa738bfc"
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}
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],
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"title": "scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE",
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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-2026-72083",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:51:39.405960Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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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": "2026-10-19T21:19:26.910Z"
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}
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}
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]
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}
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} |