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-2026-72233",
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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": "2026-08-15T05:54:23.663Z",
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"dateUpdated": "2026-10-16T18:45:03.576Z"
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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": "2026-08-17T05:41:50.777Z"
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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: bla: reacquire gw address after skb realloc\n\nThe pskb_may_pull() called by batadv_bla_is_backbone_gw() could reallocate\nthe buffer behind the skb. Variables which were pointing to the old buffer\nneed to be reassigned to avoid an use-after-free."
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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:A/AC:L/PR:N/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:A - The bug is hit in batadv_recv_unicast_packet() when batman-adv ETH_P_BATMAN frames are received on a mesh hard interface via batadv_batman_skb_recv(); exploitation requires a peer on the same wireless/bridged mesh segment (community, industrial, or gateway meshes), matching adjacent Wi-Fi/L2 reachability rather than arbitrary Internet routing.\nAC:L - An on-mesh attacker fully controls the injected unicast skb (headers, VLAN tagging) to make batadv_bla_is_backbone_gw()'s pskb_may_pull() reallocate the buffer; this is a deterministic use-after-free with no victim-timed race or layout the attacker cannot influence by resending crafted frames.\nPR:N - No account or capability on the victim host is required; any unauthenticated mesh participant (or L2 source spoofer on the mesh/backbone) can send batman-adv unicast packets destined to the victim's MAC through the normal RX handler without local login or CAP_NET_ADMIN on the target.\nUI:N - The vulnerable path runs automatically in softirq when the mesh interface receives qualifying unicast traffic; the victim operator does not need to mount a filesystem, click a link, or perform any deliberate action beyond running an active batman-adv mesh with bridge loop avoidance enabled.\nS:U - Exploitation corrupts or reads kernel heap memory inside the batman-adv RX path on the same host; it does not cross a VM/hypervisor, container, or IOMMU security boundary to impact a different authority's resources.\nC:H - After pskb_may_pull() frees the old skb head, the stale orig_addr_gw pointer is read through %pM in batadv_dbg(), constituting a kernel slab use-after-free that can disclose adjacent freed-object contents and is scored as arbitrary-read class per UAF guidance.\nI:H - Use-after-free of skb linear data is heap memory corruption; even though the immediate stale access is for logging, UAF on RX skbs enables spray/reuse of the freed buffer for control of subsequent kernel objects and potential write primitives.\nA:H - Dereferencing a freed skb buffer in interrupt/RX context can trigger KASAN slab-use-after-free reports, kernel oops, or panic on affected builds; any exploitable UAF on the packet receive path is rated high availability impact."
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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/routing.c"
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],
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"versions": [
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{
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"version": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "41819c5467b6eb8ab4567f0ac98702ce9b6abbb1",
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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": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f",
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"status": "affected",
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},
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{
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"version": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "4a6673c55752a7aa41e28f51660eb981504ca088",
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"status": "affected",
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"lessThan": "ab2bac47a02637df1128a151e81d3ec14767f4bb",
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"status": "affected",
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},
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{
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"version": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "dc16bbf53cede1baf564bf0c8a861114b64e18b3",
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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": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "e5e18886aadd3870e2d84e32a9678317fab1dd9e",
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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": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf",
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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": "9e794b6bf4a2c65d698d7433ddfabc54a5d53a88",
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"lessThan": "cdf3b5af2bc4431e58629e8ad2086b1e9185c761",
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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/routing.c"
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],
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"versions": [
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{
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"version": "4.12",
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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": "4.12",
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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": "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": "4.12",
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"versionEndExcluding": "5.10.261"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/41819c5467b6eb8ab4567f0ac98702ce9b6abbb1"
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},
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{
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"url": "https://git.kernel.org/stable/c/a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f"
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},
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{
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"url": "https://git.kernel.org/stable/c/4a6673c55752a7aa41e28f51660eb981504ca088"
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},
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{
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"url": "https://git.kernel.org/stable/c/ab2bac47a02637df1128a151e81d3ec14767f4bb"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc16bbf53cede1baf564bf0c8a861114b64e18b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/e5e18886aadd3870e2d84e32a9678317fab1dd9e"
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},
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{
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"url": "https://git.kernel.org/stable/c/f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf"
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},
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{
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"url": "https://git.kernel.org/stable/c/cdf3b5af2bc4431e58629e8ad2086b1e9185c761"
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}
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],
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"title": "batman-adv: bla: reacquire gw address after skb realloc",
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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-2026-72233",
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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": "2026-10-16T18:44:31.631012Z"
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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": "2026-10-16T18:45:03.576Z"
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}
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}
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]
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}
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} |