235 lines
12 KiB
JSON
235 lines
12 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-2026-72330",
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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": "2026-08-09T03:40:39.919Z",
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"datePublished": "2026-08-15T05:55:40.555Z",
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"dateUpdated": "2026-10-16T18:55:18.242Z"
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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": "2026-08-17T05:42:52.302Z"
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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\nnet/tls: Consume empty data records in tls_sw_read_sock()\n\nA peer may send a zero-length TLS application_data record; TLS 1.3\nexplicitly permits these as a traffic-analysis countermeasure (RFC\n8446, Section 5.1). After decryption such a record has full_len ==\n0. tls_sw_read_sock() hands it to the read_actor, which has no\npayload to consume and returns zero. The loop treats a zero return\nas backpressure (used <= 0), requeues the skb at the head of\nrx_list, and stops. rx_list is serviced head-first on the next\ncall, so the empty record is dequeued, fails the same way, and is\nrequeued again; every later record on the connection is blocked\nbehind it.\n\ntls_sw_recvmsg() does not stall on this: a zero-length data record\ncopies nothing and falls through to consume_skb(). Mirror that in\nthe read_sock() path by recognizing an empty data record before\nthe actor runs, consuming it, and continuing."
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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 - A remote TLS peer sends zero-length TLS 1.3 application_data records over TCP; they are decrypted in the kTLS software RX path and processed in tls_sw_read_sock(), reachable from network-facing consumers such as NVMe-over-TCP host I/O via sock->ops->read_sock.\nAC:L - After a normal TLS handshake, sending a standards-compliant zero-length application_data record reliably reproduces the stall; no races, special memory layout, or rare timing are required.\nPR:N - Exploitation requires only being the remote TLS peer on an established kTLS connection (e.g. a malicious NVMe-oF target); no local account, capability, namespace, or administrator privileges on the victim host are needed.\nUI:N - No victim user action beyond the system maintaining its normal encrypted network connection; the attacker triggers the flaw by sending protocol-valid TLS records.\nS:U - Impact is confined to stalling the affected TLS/kTLS connection and its dependent service I/O; it does not cross a security boundary such as guest-to-host escape or sandbox breakout.\nC:N - The flaw is a receive-path logic error that requeues an empty skb indefinitely; there is no out-of-bounds access, use-after-free, or other memory corruption that could disclose kernel or application data.\nI:N - The bug does not modify kernel memory, credentials, or application data; it only prevents forward progress on the stalled connection by blocking consumption of subsequent decrypted records.\nA:H - The empty record is permanently requeued at the head of rx_list, creating a repeatable deadlock that blocks all later traffic on the connection and can hang NVMe-over-TCP (or similar read_sock) I/O until the connection is torn down."
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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/tls/tls_sw.c"
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],
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"versions": [
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{
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"version": "662fbcec32f4af6bdcf5b4006b792ebe9543d945",
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"lessThan": "0867b0f2513ebc1c475af9898c97f4772a68d964",
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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": "662fbcec32f4af6bdcf5b4006b792ebe9543d945",
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"lessThan": "c6b440cf766a557b08d25f1b571b3d57d039686e",
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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": "662fbcec32f4af6bdcf5b4006b792ebe9543d945",
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"lessThan": "e8a4c9fc437b16aef38f86ce3275677e36924259",
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"status": "affected",
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},
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{
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"version": "662fbcec32f4af6bdcf5b4006b792ebe9543d945",
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"lessThan": "ebc295ce343600c2d60c1e1e0c5d192080217457",
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"status": "affected",
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},
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{
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"version": "662fbcec32f4af6bdcf5b4006b792ebe9543d945",
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"lessThan": "3be28e2c9cd0230cb51fd4967df095273afd3848",
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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/tls/tls_sw.c"
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],
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"versions": [
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{
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"version": "6.6",
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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": "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": "6.6.145",
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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": "6.6",
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"versionEndExcluding": "6.6.145"
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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": "6.6",
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"versionEndExcluding": "6.12.97"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "7.1.5"
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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": "6.6",
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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/0867b0f2513ebc1c475af9898c97f4772a68d964"
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},
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{
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"url": "https://git.kernel.org/stable/c/c6b440cf766a557b08d25f1b571b3d57d039686e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8a4c9fc437b16aef38f86ce3275677e36924259"
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},
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{
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"url": "https://git.kernel.org/stable/c/ebc295ce343600c2d60c1e1e0c5d192080217457"
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},
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{
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"url": "https://git.kernel.org/stable/c/3be28e2c9cd0230cb51fd4967df095273afd3848"
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}
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],
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"title": "net/tls: Consume empty data records in tls_sw_read_sock()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2026-72330",
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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": "2026-10-16T18:47:08.220194Z"
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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": "2026-10-16T18:55:18.242Z"
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}
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}
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]
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}
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} |