269 lines
13 KiB
JSON
269 lines
13 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-2025-37778",
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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": "2025-04-16T04:51:23.940Z",
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"datePublished": "2025-05-01T13:07:16.472Z",
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"dateUpdated": "2026-10-15T21:51:59.708Z"
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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": "2026-08-05T11:57:29.622Z"
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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\nksmbd: Fix dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess->user and does not set the pointer\nto NULL. It calls ksmbd_krb5_authenticate to reinitialise\nsess->user but that function may return without doing so. If\nthat happens then smb2_sess_setup, which calls krb_authenticate,\nwill be accessing free'd memory when it later uses sess->user."
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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 - ksmbd is the in-kernel SMB server listening on TCP port 445; the vulnerable krb5_authenticate path is reached by processing an attacker-supplied SMB2 SESSION_SETUP request from a remote client.\nAC:L - The attacker deterministically forces the dangling pointer by sending a Kerberos SPNEGO blob that ksmbd_krb5_authenticate rejects before reinitializing sess->user; no race or uncontrolled condition is involved, and Kerberos-enabled ksmbd is a normal AD deployment.\nPR:N - In the most severe reasonable deployment (guest access enabled), the attacker establishes a VALID session with no credentials, then re-authenticates with a failing Kerberos blob; the failing krb5 exchange itself needs no valid credentials, so no privileges are required.\nUI:N - The entire attack is driven by the remote client sending crafted SMB2 packets; no action by any local user or victim is needed.\nS:U - The use-after-free and double-free corrupt kernel heap state within the kernel's own security authority, without crossing into a separate security scope such as a VM or IOMMU boundary.\nC:H - The dangling sess->user is read after being freed and its slab slot can be reallocated with attacker-controlled contents, yielding a use-after-free read primitive over kernel memory.\nI:H - The double-free plus freeing of pointer fields (name/passkey/sgid) read from a reallocatable freed object provides a controlled-free/heap-corruption primitive that can be leveraged into arbitrary write and control-flow hijack.\nA:H - The use-after-free and double-free readily cause slab corruption and a kernel oops/panic, taking down the system."
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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/smb/server/smb2pdu.c"
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],
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"versions": [
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{
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "b61f04d5d73c53d183019bafe22fb700a739bac5",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "d5b554bc8d554ed6ddf443d3db2fad9f665cec10",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "1db2451de23e98bc864c6a6e52aa0d82c91cb325",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "6e30c0e10210c714f3d4453dc258d4abcc70364e",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "e83e39a5f6a01a81411a4558a59a10f87aa88dd6",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "1e440d5b25b7efccb3defe542a73c51005799a5f",
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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/smb/server/smb2pdu.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "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": "5.15.203",
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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": "6.1.135",
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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": "6.6.88",
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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": "6.12.25",
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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": "6.14.4",
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"lessThanOrEqual": "6.14.*",
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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": "6.15",
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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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"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": "5.15",
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"versionEndExcluding": "5.15.203"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/b61f04d5d73c53d183019bafe22fb700a739bac5"
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},
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{
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"url": "https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10"
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"url": "https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325"
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{
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"url": "https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e"
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{
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"url": "https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6"
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},
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{
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"url": "https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f"
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}
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],
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"title": "ksmbd: Fix dangling pointer in krb_authenticate",
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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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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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}
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],
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:54:55.466Z"
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}
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},
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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-2025-37778",
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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": "2026-10-15T21:45:08.250417Z"
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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": "2026-10-15T21:51:59.708Z"
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}
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}
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]
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}
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} |