314 lines
16 KiB
JSON
314 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-2025-38375",
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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": "2025-04-16T04:51:24.009Z",
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"datePublished": "2025-07-25T12:53:17.629Z",
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"dateUpdated": "2026-10-15T21:52:14.862Z"
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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": "2026-08-05T12:01:26.660Z"
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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\nvirtio-net: ensure the received length does not exceed allocated size\n\nIn xdp_linearize_page, when reading the following buffers from the ring,\nwe forget to check the received length with the true allocate size. This\ncan lead to an out-of-bound read. This commit adds that missing check."
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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:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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:L - The attacker-controlled value is the used-ring length written by the virtio backend (hypervisor/VMM, vhost-user daemon, VDUSE device, or vDPA hardware), not anything carried in received network packets, so a remote peer cannot reach it. The attack is delivered over the local paravirtual transport, matching kernel CNA precedent for virtio device-supplied-length bugs (CVE-2026-64456, CVE-2026-46123).\nAC:L - The backend fully and deterministically controls both `hdr->num_buffers` and the used-ring `len`, with no race to win and no memory-layout guessing required; a single crafted RX completion triggers it every time. XDP attachment is a target configuration the backend can observe via the guest's headroom/GSO renegotiation, not an uncontrollable condition.\nPR:N - The malicious backend needs no credentials, account, or capability inside the victim guest — it simply completes a receive buffer with a bogus length. This matches the PR:N scoring used for the equivalent virtio_bt and hwrng-virtio device-length CVEs.\nUI:N - Triggering requires only that the driver process an RX completion in NAPI/softirq context, which happens automatically. No victim action of any kind is needed.\nS:U - The vulnerable component and the impacted component are both the virtio_net driver's own kernel, and a host-to-guest attack does not gain the attacker authority it did not already hold. This is not a guest-to-host escape or an IOMMU/DMA boundary bypass.\nC:H - Each malformed completion copies up to ~3.5 KB of adjacent kernel memory into the linearized packet, which the XDP program can then XDP_TX/XDP_REDIRECT back to the attacker or which reaches userspace via a socket, giving a repeatable kernel memory disclosure channel. The integer-overflow variant extends the read arbitrarily far past the source buffer.\nI:H - The `page_off + buflen + tailroom > PAGE_SIZE` guard is defeated by unsigned wraparound (verified: `buflen = 0xFFFFFD5C` makes the sum evaluate to 0), so the memcpy writes gigabytes beyond the single-page destination, corrupting arbitrary kernel heap memory. That is an out-of-bounds write, not merely the out-of-bounds read named in the commit message.\nA:H - Reading past the end of the source page, or the multi-gigabyte memcpy from the overflow variant, faults in softirq context and oopses/panics the kernel, and is instantly reproducible under KASAN or DEBUG_PAGEALLOC. The wholesale kernel memory corruption makes a crash the expected outcome."
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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/net/virtio_net.c"
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],
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"versions": [
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{
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"version": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "773e95c268b5d859f51f7547559734fd2a57660c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"status": "affected",
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},
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"status": "affected",
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},
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{
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"version": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "6aca3dad2145e864dfe4d1060f45eb1bac75dd58",
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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": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "80b971be4c37a4d23a7f1abc5ff33dc7733d649b",
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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": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "bc68bc3563344ccdc57d1961457cdeecab8f81ef",
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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": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "11f2d0e8be2b5e784ac45fa3da226492c3e506d8",
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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": "4941d472bf95b4345d6e38906fcf354e74afa311",
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"lessThan": "315dbdd7cdf6aa533829774caaf4d25f1fd20e73",
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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/net/virtio_net.c"
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],
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"versions": [
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{
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"version": "4.14",
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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": "4.14",
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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": "5.4.297",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.241",
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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": "5.15.189",
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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": "6.1.144",
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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": "6.6.97",
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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": "6.12.37",
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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": "6.15.6",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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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"url": "https://git.kernel.org/stable/c/773e95c268b5d859f51f7547559734fd2a57660c"
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},
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{
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"url": "https://git.kernel.org/stable/c/ddc8649d363141fb3371dd81a73e1cb4ef8ed1e1"
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},
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{
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"url": "https://git.kernel.org/stable/c/982beb7582c193544eb9c6083937ec5ac1c9d651"
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},
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{
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"url": "https://git.kernel.org/stable/c/6aca3dad2145e864dfe4d1060f45eb1bac75dd58"
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},
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{
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"url": "https://git.kernel.org/stable/c/80b971be4c37a4d23a7f1abc5ff33dc7733d649b"
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},
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{
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"url": "https://git.kernel.org/stable/c/bc68bc3563344ccdc57d1961457cdeecab8f81ef"
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{
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"url": "https://git.kernel.org/stable/c/11f2d0e8be2b5e784ac45fa3da226492c3e506d8"
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{
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"url": "https://git.kernel.org/stable/c/315dbdd7cdf6aa533829774caaf4d25f1fd20e73"
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}
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],
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"title": "virtio-net: ensure the received length does not exceed allocated size",
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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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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T17:37:12.435Z"
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}
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},
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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-2025-38375",
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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": "2026-10-15T21:49:50.702440Z"
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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": "2026-10-15T21:52:14.862Z"
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}
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}
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]
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}
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} |