206 lines
11 KiB
JSON
206 lines
11 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-2026-93805",
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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": "2026-09-18T17:59:28.790Z",
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"datePublished": "2026-09-24T16:02:39.248Z",
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"dateUpdated": "2026-10-03T10:57:38.089Z"
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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": "2026-10-03T10:57:38.089Z"
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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\nwifi: cfg80211: validate rx/tx MLME callback frame lengths before access\n\ncfg80211_rx_mlme_mgmt() and cfg80211_tx_mlme_mgmt() call tracepoints\nbefore rejecting frames shorter than the frame-control field. After\nthat, they only require len >= 2 before dispatching into subtype\nhandlers that assume their fixed fields are present.\n\nThe frames that trip this are not shorter than 2 bytes; they are short\nrelative to their subtype. mwifiex is a concrete in-tree example on the\nlength side: mwifiex_process_mgmt_packet() only requires a 4-address\nieee80211_hdr plus the 2-byte firmware length prefix before handing the\nframe to cfg80211_rx_mlme_mgmt(). After stripping the length prefix and\nremoving addr4, pkt_len can be exactly 24: a bare 3-address management\nheader with no reason-code body. The existing WARN_ON(len < 2) does not\nfire on such a frame, and cfg80211_process_deauth() then reads\nu.deauth.reason_code as a two-byte access starting at offset 24,\nimmediately past the 24-byte buffer.\n\nAdd a frame-control length gate, then validate each subtype's minimum\nframe size in an if/else-if chain that mirrors the dispatch logic. Trace\nonly after the frame is known to be well-formed.\n\nSide effects of this change:\n - The WARN_ON(len < 2) is dropped. It only guarded the frame_control\n read, never the subtype fixed fields, and it does not fire on the\n frames that actually trigger the out-of-bounds read (which are >= 2).\n The len >= 2 check is kept as the guard before dereferencing\n frame_control, but without the warning: these are exported callbacks\n and a malformed frame from a driver should be dropped silently rather\n than backtraced.\n - cfg80211_tx_mlme_mgmt() previously routed every non-deauth subtype\n through disassociation handling; it now silently ignores unrecognised\n subtypes."
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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/wireless/mlme.c"
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],
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"versions": [
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{
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"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a",
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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": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "ce2a3be6909462f49c34de96be71f0ad5f0d573f",
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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": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "6bdf4dcff98df634e04ebf99f52027a48d7f78ff",
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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": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "0ec738a0d361d7eb37188117166d201f9df622d3",
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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": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "8f4127a93cf60d561ad39849a9ac763ba0e14db5",
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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": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942",
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"lessThan": "d5e4586546974179feca305a94e07fac3e9727fe",
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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/wireless/mlme.c"
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],
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"versions": [
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{
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"version": "2.6.32",
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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": "2.6.32",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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": "7.2",
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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": "2.6.32",
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"versionEndExcluding": "5.15.222"
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},
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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": "2.6.32",
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"versionEndExcluding": "6.1.189"
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},
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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": "2.6.32",
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"versionEndExcluding": "6.6.158"
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},
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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": "2.6.32",
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"versionEndExcluding": "6.12.111"
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},
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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": "2.6.32",
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"versionEndExcluding": "6.18.53"
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},
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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": "2.6.32",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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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/6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce2a3be6909462f49c34de96be71f0ad5f0d573f"
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},
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{
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"url": "https://git.kernel.org/stable/c/6bdf4dcff98df634e04ebf99f52027a48d7f78ff"
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},
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{
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"url": "https://git.kernel.org/stable/c/0ec738a0d361d7eb37188117166d201f9df622d3"
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},
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{
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"url": "https://git.kernel.org/stable/c/8f4127a93cf60d561ad39849a9ac763ba0e14db5"
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},
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{
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"url": "https://git.kernel.org/stable/c/d5e4586546974179feca305a94e07fac3e9727fe"
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}
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],
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"title": "wifi: cfg80211: validate rx/tx MLME callback frame lengths before access",
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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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}
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} |