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-2026-72231",
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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": "2026-08-09T03:40:39.913Z",
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"datePublished": "2026-08-15T05:54:22.076Z",
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"dateUpdated": "2026-10-16T18:45:03.082Z"
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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": "2026-08-17T05:41:48.586Z"
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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\nbatman-adv: tt: avoid request storms during pending request\n\nbatadv_send_tt_request() allocates a tt_req_node when none exists for the\ndestination originator node. This should prevent that a multiple TT\nrequests are send at the same time to an originator.\n\nBut if allocation of the send buffer failed, this request must be cleaned\nup again. But indicator for such a failure is \"ret == false\". But the\nactual implementation is checking for \"ret == true\".\n\nThe check must be inverted to not loose the information about the TT\nrequest directly after it was attempted to be sent out. This should avoid\npotential request storms."
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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:N/I:N/A:H",
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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 - The bug is reached when remote batman-adv OGM/TVLV packets are received on an active mesh hardif via batadv_batman_skb_recv() → batadv_iv_ogm_recv() → batadv_tvlv_ogm_receive() → batadv_tt_update_orig() → batadv_send_tt_request(), with no local syscall required on the victim.\nAC:L - A mesh attacker can deterministically craft OGMs with mismatched TTVN/CRC to force the request_table path on every received OGM; the inverted ret check removes the pending tt_req_node after each successful send, eliminating deduplication so storms are repeatable without races.\nPR:N - batman-adv OGM/TVLV processing performs no authentication or capability check on senders; any mesh peer that can inject ETH_P_BATMAN frames onto the victim's active hardif triggers the vulnerable path without Linux credentials on the victim host.\nUI:N - No victim user action is required once batman-adv is active; the kernel automatically processes incoming OGMs and issues TT_REQUEST unicasts in response to detected translation-table inconsistency, entirely driven by attacker-supplied mesh traffic.\nS:U - Impact is confined to excessive batman-adv translation-table control traffic and resource exhaustion on the victim mesh node within the kernel networking stack; it does not cross VM, container, IOMMU, or other security authority boundaries.\nC:N - The inverted conditional is a pure logic error in tt_req_node list housekeeping; it causes neither out-of-bounds access, use-after-free, nor uninitialized data transmission, so no information-disclosure or memory-read primitive exists.\nI:N - No attacker-controlled kernel memory writes or data corruption occur; the bug only suppresses pending-request tracking so duplicate TT_REQUEST packets are emitted, flooding mesh bandwidth without modifying stored translation-table contents.\nA:H - Removing the tt_req_node immediately after each successful TT_REQUEST disables the one-request-per-originator guard, letting a remote attacker drive unbounded GFP_ATOMIC allocations and mesh-wide TT_REQUEST storms that can exhaust CPU, memory, and link capacity on community mesh nodes."
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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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"net/batman-adv/translation-table.c"
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],
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"versions": [
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{
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"version": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "6055695ea40c64a47e00742c12c99b1a33b4daed",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "21c44a6895f41df811d1c91d10eea194dda2b345",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "5e46c76d9a5062212c4c5f642a5549fd9c057f8a",
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{
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"lessThan": "067e413eec2e63c2996909ef55214b3a0eda0be7",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "716f434eb35869e130424331584a91fbb729b9bd",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "6a65ac8a81e903bb4b555c1d13532f5cb0167a4a",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "aba1cf21954e64c36afb966b754adad2b0b8aa48",
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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": "335fbe0f5d2501b7dd815806aef6fd9bad784eb1",
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"lessThan": "27c7d40008231ae4140d35501b60087a9de2d2c3",
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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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"net/batman-adv/translation-table.c"
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],
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"versions": [
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{
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"version": "3.13",
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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": "3.13",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.13",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6055695ea40c64a47e00742c12c99b1a33b4daed"
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},
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{
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"url": "https://git.kernel.org/stable/c/21c44a6895f41df811d1c91d10eea194dda2b345"
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},
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{
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"url": "https://git.kernel.org/stable/c/5e46c76d9a5062212c4c5f642a5549fd9c057f8a"
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},
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{
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"url": "https://git.kernel.org/stable/c/067e413eec2e63c2996909ef55214b3a0eda0be7"
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},
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{
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"url": "https://git.kernel.org/stable/c/716f434eb35869e130424331584a91fbb729b9bd"
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},
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{
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"url": "https://git.kernel.org/stable/c/6a65ac8a81e903bb4b555c1d13532f5cb0167a4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/aba1cf21954e64c36afb966b754adad2b0b8aa48"
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},
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{
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"url": "https://git.kernel.org/stable/c/27c7d40008231ae4140d35501b60087a9de2d2c3"
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}
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],
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"title": "batman-adv: tt: avoid request storms during pending request",
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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-2026-72231",
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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": "2026-10-16T18:44:21.954834Z"
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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": "2026-10-16T18:45:03.082Z"
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}
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}
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]
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}
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} |