328 lines
16 KiB
JSON
328 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-2025-21669",
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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": "2024-12-29T08:45:45.735Z",
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"datePublished": "2025-01-31T11:25:33.185Z",
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"dateUpdated": "2026-10-15T01:02:55.148Z"
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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": "2026-08-05T11:53:30.113Z"
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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\nvsock/virtio: discard packets if the transport changes\n\nIf the socket has been de-assigned or assigned to another transport,\nwe must discard any packets received because they are not expected\nand would cause issues when we access vsk->transport.\n\nA possible scenario is described by Hyunwoo Kim in the attached link,\nwhere after a first connect() interrupted by a signal, and a second\nconnect() failed, we can find `vsk->transport` at NULL, leading to a\nNULL pointer dereference."
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 vulnerability is reached through AF_VSOCK socket syscalls (`connect()`) plus packets delivered by the local `vsock_loopback` transport, all from a local process. Per kernel scoring guidance vsock is Local.\nAC:L - The attacker controls every element: both `connect()` calls, the interrupting signal (self-delivered via `alarm()`/`pthread_kill()`), the peer socket that times the RESPONSE, and the RST/SHUTDOWN packet, and the sequence can be retried indefinitely.\nPR:L - `vsock_create()` performs no capability check and `CONFIG_VSOCKETS_LOOPBACK` is `default y`, so any unprivileged local user can create AF_VSOCK sockets, auto-bind an ephemeral port, and inject loopback packets.\nUI:N - The entire sequence — double connect, signal, packet injection — is performed by the attacker's own process with no victim action required.\nS:U - The corruption and crash are confined to the kernel of the machine running the attacker's process; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - When the socket has been reassigned to a non-virtio transport, `vsk->trans` is type-confused as `struct virtio_vsock_sock`, letting the receive path read and act on mistyped heap state (mistyped `sk_buff_head` in `virtio_transport_recv_enqueue()`, `container_of` on a non-`virtio_transport` ops struct), which is leverageable for arbitrary kernel memory disclosure.\nI:H - The same type confusion writes two fully attacker-controlled 32-bit header values (`buf_alloc`/`fwd_cnt`) into the middle of a differently-typed heap object (over `qpair`/`produce_size` in `struct vmci_transport`) and performs an indirect call through `t_ops->send_pkt` derived from a bogus `container_of`, giving a controlled-write and control-flow hijack primitive.\nA:H - The confirmed and reported impact is a NULL pointer dereference at `vsk->transport->stream_has_data()` while the socket lock is held, producing a kernel oops/panic that an unprivileged user can trigger on demand."
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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/vmw_vsock/virtio_transport_common.c"
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],
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"versions": [
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{
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "18a7fc371d1dbf8deff16c2dd9292bcc73f43040",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "6486915fa661584d70e8e7e4068c6c075c67dd6d",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "d88b249e14bd0ee1e46bbe4f456e22e01b8c68de",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "677579b641af109613564460a4e3bdcb16850b61",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1",
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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/vmw_vsock/virtio_transport_common.c"
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],
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"versions": [
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{
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"version": "5.5",
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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": "5.5",
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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": "5.10.234",
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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": "5.15.177",
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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": "6.1.127",
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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": "6.6.74",
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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": "6.12.11",
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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",
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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": "5.5",
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"versionEndExcluding": "5.10.234"
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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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"versionEndExcluding": "6.1.127"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.6.74"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.5",
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"versionEndExcluding": "6.12.11"
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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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}
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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/18a7fc371d1dbf8deff16c2dd9292bcc73f43040"
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},
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{
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"url": "https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d"
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},
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{
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"url": "https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee"
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},
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{
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"url": "https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de"
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},
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{
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"url": "https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61"
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},
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{
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"url": "https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1"
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}
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],
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"title": "vsock/virtio: discard packets if the transport changes",
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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": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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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": "NONE"
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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-2025-21669",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-10-01T19:52:17.860929Z"
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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-476",
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"description": "CWE-476 NULL Pointer Dereference"
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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": "2025-10-01T19:57:12.459Z"
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}
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},
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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/2025/03/msg00001.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.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": "2025-11-03T20:58:50.209Z"
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}
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},
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:02:55.148Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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}
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],
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
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}
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]
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}
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]
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}
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} |