289 lines
15 KiB
JSON
289 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-2026-23193",
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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": "2026-01-13T15:37:45.985Z",
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"datePublished": "2026-02-14T16:27:20.251Z",
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"dateUpdated": "2026-10-19T18:25:34.873Z"
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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": "2026-08-05T12:20:35.890Z"
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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 use-after-free in iscsit_dec_session_usage_count()\n\nIn iscsit_dec_session_usage_count(), the function calls complete() while\nholding the sess->session_usage_lock. Similar to the connection usage count\nlogic, the waiter signaled by complete() (e.g., in the session release\npath) may wake up and free the iscsit_session structure immediately.\n\nThis creates a race condition where the current thread may attempt to\nexecute spin_unlock_bh() on a session structure that has already been\ndeallocated, resulting in a KASAN slab-use-after-free.\n\nTo resolve this, release the session_usage_lock before calling complete()\nto ensure all dereferences of the sess pointer are finished before the\nwaiter is allowed to proceed with deallocation."
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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:L/UI:N/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 iSCSI target is a network-facing service listening on TCP port 3260. An authenticated remote initiator can trigger session logout or reinstatement flows that reach the vulnerable function.\nAC:L - The race condition is inherent in the code path — whenever session_usage_count reaches 0 with a waiter, the UAF occurs deterministically because complete() wakes the waiter before spin_unlock_bh(). The attacker triggers this by initiating session logout, and the bug fires reliably.\nPR:L - An iSCSI initiator must authenticate (via CHAP or ACL) before establishing a session. Only authenticated sessions can trigger logout/reinstatement paths that call iscsit_dec_session_usage_count().\nUI:N - No user interaction is required. The attacker directly connects to the iSCSI target service, authenticates, and triggers session logout or reinstatement.\nS:U - The vulnerability affects the kernel within the same security authority. There is no crossing of a VM boundary or sandbox escape.\nC:H - This is a use-after-free on a kernel heap object (iscsit_session structure). UAFs allow an attacker to control freed object contents via heap spraying, potentially enabling arbitrary kernel memory reads.\nI:H - The use-after-free on the session structure enables heap spraying attacks that can achieve arbitrary write primitives and control flow hijacking in kernel context.\nA:H - The use-after-free causes a KASAN slab-use-after-free (as reported), which results in a kernel crash/oops, causing complete denial of service."
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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_util.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": "2b64015550a13bcc72910be0565548d9a754d46d",
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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": "fd8b0900173307039d3a84644c2fee041a7ed4fb",
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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": "d8dbdc146e9e9a976931b78715be2e91299049f9",
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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": "11ebafffce31efc6abeb28c509017976fc49f1ca",
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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": "41b86a9ec037bd3435d68dd3692f0891a207e7e7",
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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": "4530f4e4d0e6a207110b0ffed0c911bca43531a4",
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"status": "affected",
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"versionType": "git"
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{
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"version": "e48354ce078c079996f89d715dfa44814b4eba01",
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"lessThan": "84dc6037390b8607c5551047d3970336cb51ba9a",
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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_util.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": "5.10.250",
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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": "5.15.200",
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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": "6.1.163",
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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": "6.6.124",
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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": "6.12.70",
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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": "6.18.10",
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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": "6.19",
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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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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.1",
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"versionEndExcluding": "5.10.250"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d"
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"url": "https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb"
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{
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"url": "https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9"
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},
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{
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"url": "https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca"
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},
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{
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"url": "https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4"
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"url": "https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a"
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}
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],
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"title": "scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2026-23193",
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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": "2026-06-16T20:19:30.330319Z"
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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": "2026-10-19T18:25:34.873Z"
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}
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}
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]
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}
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} |