312 lines
16 KiB
JSON
312 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-2026-52914",
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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": "2026-06-09T07:44:35.367Z",
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"datePublished": "2026-06-24T07:14:11.906Z",
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"dateUpdated": "2026-10-19T19:36:59.956Z"
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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": "2026-08-05T12:31:36.920Z"
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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: fix fragment reassembly length accounting\n\nbatman-adv keeps a running payload length for queued fragments and uses it\nto validate a fragment chain before reassembly.\n\nThat accounting currently allows the accumulated fragment length to be\ntruncated during updates. As a result, malformed fragment chains can\nbypass the intended validation and drive reassembly with inconsistent\nlength state, leading to a local denial of service.\n\nFix the accounting by storing the accumulated length in a length-typed\nfield and rejecting update overflows before the existing validation logic\nruns.\n\nThe fix was verified against the original reproducer and against valid\nfragment reassembly paths."
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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 - The vulnerable path is reached by received ETH_P_BATMAN BATADV_UNICAST_FRAG network frames through batadv_batman_skb_recv(). A remote BATMAN-adv mesh peer can deliver crafted fragments to the target node without using a local syscall or device file.\nAC:L - The attacker controls the fragment sequence number, fragment number, total_size field, and payload lengths needed to trigger the wrapped accounting. In a reasonable high-MTU BATMAN-adv deployment, no race or victim-specific state beyond an active mesh interface is required.\nPR:N - The receive path performs packet-format, destination-MAC, mesh-state, and originator lookups, but no authentication or privilege check on the sender. An attacker sending accepted BATMAN-adv frames needs no privileges on the target.\nUI:N - Exploitation is triggered solely by delivery of crafted BATMAN-adv fragments to an active interface. No victim user action is required.\nS:U - The vulnerability corrupts or crashes the kernel handling the same BATMAN-adv/networking security authority. It does not cross a separate boundary such as guest-to-host or IOMMU isolation.\nC:H - The truncated length state can drive reassembly with inconsistent sizing and attacker-controlled fragment data, creating plausible kernel memory corruption. Under the overestimate rule, such corruption can be leveraged for kernel memory disclosure.\nI:H - The reassembly path can size the output skb from the wrapped total while copying more attacker-controlled fragment data than accounted. This is defensibly an out-of-bounds write/kernel memory corruption condition.\nA:H - At minimum, the malformed chain can hit skb tail overrun BUG/panic behavior or otherwise corrupt kernel memory. That gives a reliable kernel crash/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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"net/batman-adv/fragmentation.c",
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"net/batman-adv/types.h"
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],
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"versions": [
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{
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"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "37be61825b15534a16ff9cfc9546de155b6df982",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "975563c5de1123dde1ec7946bf5556d20c89d74e",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "f653b040dad1af70fa5cd4fe085e4758925480c9",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "e910dbf509125fe51ad68e4fa74dc8ab0a8e787a",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "3eb8bcb823391bd58997831b3c9c152a4ba8e255",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0",
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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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
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"lessThan": "9cd3f16c320bfdadd4509358122368deb56a5741",
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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/fragmentation.c",
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"net/batman-adv/types.h"
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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": "5.10.258",
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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": "5.15.209",
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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": "6.1.175",
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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": "6.6.142",
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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": "6.12.92",
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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": "6.18.34",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "3.13",
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"versionEndExcluding": "5.10.258"
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"references": [
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"url": "https://git.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64"
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{
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"url": "https://git.kernel.org/stable/c/37be61825b15534a16ff9cfc9546de155b6df982"
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{
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"url": "https://git.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74e"
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},
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{
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"url": "https://git.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9"
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},
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{
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"url": "https://git.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787a"
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},
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{
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"url": "https://git.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255"
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},
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{
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"url": "https://git.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741"
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}
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],
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"title": "batman-adv: fix fragment reassembly length accounting",
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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-2026-52914",
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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": "2026-10-16T15:22:33.098650Z"
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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-190",
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"description": "CWE-190 Integer Overflow or Wraparound"
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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": "2026-10-19T19:36:59.956Z"
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}
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}
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]
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}
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} |