263 lines
14 KiB
JSON
263 lines
14 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-2025-21927",
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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": "2024-12-29T08:45:45.788Z",
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"datePublished": "2025-04-01T15:40:58.432Z",
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"dateUpdated": "2026-10-30T12:21:00.738Z"
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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": "2026-10-30T12:21:00.738Z"
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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\nnvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()\n\nnvme_tcp_recv_pdu() doesn't check the validity of the header length.\nWhen header digests are enabled, a target might send a packet with an\ninvalid header length (e.g. 255), causing nvme_tcp_verify_hdgst()\nto access memory outside the allocated area and cause memory corruptions\nby overwriting it with the calculated digest.\n\nFix this by rejecting packets with an unexpected header length."
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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 malformed PDU arrives over a routable TCP connection (NVMe/TCP, typically port 4420/8009) and is parsed by the nvme-tcp host driver's socket receive path; a malicious/compromised NVMe-oF target or an on-path attacker injecting into the stream triggers it from anywhere on the network.\nAC:L - The attacker simply sets hdr->hlen to an arbitrary value (e.g. 255) with the HDGST flag in any rsp/r2t/c2h_data PDU — the out-of-bounds read and 4-byte out-of-bounds write occur deterministically, with no race, no memory-layout dependence, and unlimited retries thanks to the driver's automatic error-recovery reconnect.\nPR:N - The vulnerable parsing happens on any PDU received right after the ICReq/ICResp handshake, before the NVMe Connect command or any DH-HMAC-CHAP authentication, so the remote peer needs no credentials or privileges on the victim host whatsoever.\nUI:N - No victim action is needed at attack time — NVMe-oF connections are persistent system configuration established at boot and re-established automatically by nvme_tcp_error_recovery(), so a malicious target or on-path attacker can send the crafted PDU at will.\nS:U - The out-of-bounds access corrupts kernel slab memory within the same host kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - nvme_tcp_verify_hdgst() reads 4 raw heap bytes at an attacker-chosen offset up to 255 past a 28-byte kmalloc object and dev_err() prints them verbatim (\"recv %#x\"), giving a repeatable adjacent-heap disclosure primitive; the CRC input additionally hashes up to 227 bytes of out-of-bounds memory.\nI:H - The CRC32C result is written out of bounds at pdu + hlen, an attacker-chosen offset up to 227 bytes past a kmalloc-32 allocation, corrupting neighbouring slab objects; since 24 of the hashed bytes are attacker-controlled and CRC32C is invertible, heap grooming makes both the offset and the written 32-bit value effectively attacker-chosen — a controlled heap write suitable for control-flow hijacking.\nA:H - The out-of-bounds slab write corrupts adjacent kernel objects and slab metadata, causing oops/panic (immediate BUG under KASAN/hardened SLUB), and the attacker can repeat it across auto-reconnects to reliably crash the host."
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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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"drivers/nvme/host/tcp.c"
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],
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"versions": [
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{
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"version": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "3b54109b2f771f74fd53b027429796326f84ab36",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "9d22cf5cc94cd7dee84773ec41db78a46107dfa3",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "9fbc953d6b38bc824392e01850f0aeee3b348722",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "ad95bab0cd28ed77c2c0d0b6e76e03e031391064",
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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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"drivers/nvme/host/tcp.c"
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],
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"versions": [
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{
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"version": "5.0",
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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": "5.0",
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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": "6.1.191",
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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": "6.6.160",
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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": "6.12.19",
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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": "6.13.7",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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": "5.0",
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"versionEndExcluding": "6.1.191"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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": "5.0",
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"versionEndExcluding": "6.14"
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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/3b54109b2f771f74fd53b027429796326f84ab36"
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},
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{
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"url": "https://git.kernel.org/stable/c/9d22cf5cc94cd7dee84773ec41db78a46107dfa3"
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},
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{
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"url": "https://git.kernel.org/stable/c/9fbc953d6b38bc824392e01850f0aeee3b348722"
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},
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{
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"url": "https://git.kernel.org/stable/c/22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126"
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},
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{
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"url": "https://git.kernel.org/stable/c/ad95bab0cd28ed77c2c0d0b6e76e03e031391064"
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}
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],
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"title": "nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2025-21927",
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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": "2025-10-01T19:22:21.408514Z"
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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-787",
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"description": "CWE-787 Out-of-bounds Write"
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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": "2025-10-01T19:26:33.723Z"
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}
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}
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]
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}
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} |