298 lines
15 KiB
JSON
298 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-2026-72226",
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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": "2026-08-15T05:54:18.285Z",
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"dateUpdated": "2026-10-16T18:45:02.826Z"
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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": "2026-08-17T05:41:46.404Z"
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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: prevent TVLV OOB check overflow\n\nA TT unicast TVLV contains the number of VLANs stored in it. This number is\nan u16 and gets multiplied by the size of the struct\nbatadv_tvlv_tt_vlan_data (8 bytes). The size can therefore overflow the u16\nused to store the tt_vlan_len. All additional safety checks to prevent\nout-of-bounds access of the TVLV buffer are invalid due to this overflow.\n\nUsing size_t prevents this overflow and ensures that the safety checks\ncompare against the actual buffer requirements."
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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 - Crafted BATADV_UNICAST_TVLV frames from remote mesh peers reach batadv_tt_tvlv_unicast_handler_v1() via batadv_batman_skb_recv() → batadv_recv_unicast_tvlv() → batadv_tvlv_containers_process() without local syscall or ioctl access on the victim.\nAC:L - An attacker reliably bypasses TVLV bounds checks by setting num_vlan so flex_array_size() overflows the u16 tt_vlan_len (e.g. 8192 VLANs wraps length to 4); all packet fields are attacker-controlled with no races or victim-state dependencies.\nPR:N - batman-adv TVLV receive processing performs no authentication or capability check on senders; any unauthenticated mesh peer injecting ETH_P_BATMAN unicast TVLV frames to an active mesh node triggers the vulnerable path without Linux credentials on the victim.\nUI:N - Exploitation is triggered solely by the attacker transmitting malicious mesh packets; no victim mount, click, or runtime configuration change is required beyond batman-adv already being active on a mesh interface.\nS:U - Out-of-bounds reads and translation-table corruption occur within the victim kernel networking subsystem on the mesh node; the flaw does not cross VM, container, IOMMU, or other separate security-authority boundaries.\nC:H - Overflowed tt_vlan_len invalidates the length check, so batadv_handle_tt_response() offsets tt_change by struct_size() far beyond the skb and _batadv_tt_update_changes() performs out-of-bounds reads of kernel memory for each computed entry.\nI:H - Out-of-bounds tt_change data drives batadv_tt_global_add()/batadv_tt_global_del() and batadv_tt_fill_gtable(), writing attacker-influenced or leaked bytes into kmalloc-backed translation-table objects suitable for heap corruption and control-flow hijacking.\nA:H - Dereferencing tt_change pointers tens of kilobytes past the packet buffer can cause kernel oops or panic, and corrupt translation-table updates can destabilize or disable mesh routing on the victim node."
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "0de12a4c4847f571d82a9cd96bc633eded41d7c6",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "d6ff4764ff784ede25f5c83a6f5883a74c93a5ea",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "1898273c5dc8148267ef9f97cd2517a2822350e7",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "604bd5042fbcd1ab9f7cd98fd847ec017aeede8a",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "7319c0794f91be2734aac695794e7203606b49f8",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "3256c05d5a9db34346eaf20f52dddde984852d77",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "6222b443686525cb5a9b6a9cecf23b2e2ab23e2a",
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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": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
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"lessThan": "7a581d9aaba8c82bd6177fa36b2588eea77f6e2b",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.13",
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"versionEndExcluding": "5.10.261"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/0de12a4c4847f571d82a9cd96bc633eded41d7c6"
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},
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{
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"url": "https://git.kernel.org/stable/c/d6ff4764ff784ede25f5c83a6f5883a74c93a5ea"
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},
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{
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"url": "https://git.kernel.org/stable/c/1898273c5dc8148267ef9f97cd2517a2822350e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/604bd5042fbcd1ab9f7cd98fd847ec017aeede8a"
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},
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{
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"url": "https://git.kernel.org/stable/c/7319c0794f91be2734aac695794e7203606b49f8"
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},
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{
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"url": "https://git.kernel.org/stable/c/3256c05d5a9db34346eaf20f52dddde984852d77"
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},
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{
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"url": "https://git.kernel.org/stable/c/6222b443686525cb5a9b6a9cecf23b2e2ab23e2a"
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},
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{
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"url": "https://git.kernel.org/stable/c/7a581d9aaba8c82bd6177fa36b2588eea77f6e2b"
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}
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],
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"title": "batman-adv: tt: prevent TVLV OOB check overflow",
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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-2026-72226",
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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": "2026-10-16T18:44:17.010963Z"
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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": "2026-10-16T18:45:02.826Z"
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}
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}
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]
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}
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} |