242 lines
13 KiB
JSON
242 lines
13 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-2023-52991",
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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": "2025-03-27T16:40:15.741Z",
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"datePublished": "2025-03-27T16:43:26.991Z",
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"dateUpdated": "2026-08-05T09:12:18.633Z"
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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": "2026-08-05T09:12:18.633Z"
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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: fix NULL pointer in skb_segment_list\n\nCommit 3a1296a38d0c (\"net: Support GRO/GSO fraglist chaining.\")\nintroduced UDP listifyed GRO. The segmentation relies on frag_list being\nuntouched when passing through the network stack. This assumption can be\nbroken sometimes, where frag_list itself gets pulled into linear area,\nleaving frag_list being NULL. When this happens it can trigger\nfollowing NULL pointer dereference, and panic the kernel. Reverse the\ntest condition should fix it.\n\n[19185.577801][ C1] BUG: kernel NULL pointer dereference, address:\n...\n[19185.663775][ C1] RIP: 0010:skb_segment_list+0x1cc/0x390\n...\n[19185.834644][ C1] Call Trace:\n[19185.841730][ C1] <TASK>\n[19185.848563][ C1] __udp_gso_segment+0x33e/0x510\n[19185.857370][ C1] inet_gso_segment+0x15b/0x3e0\n[19185.866059][ C1] skb_mac_gso_segment+0x97/0x110\n[19185.874939][ C1] __skb_gso_segment+0xb2/0x160\n[19185.883646][ C1] udp_queue_rcv_skb+0xc3/0x1d0\n[19185.892319][ C1] udp_unicast_rcv_skb+0x75/0x90\n[19185.900979][ C1] ip_protocol_deliver_rcu+0xd2/0x200\n[19185.910003][ C1] ip_local_deliver_finish+0x44/0x60\n[19185.918757][ C1] __netif_receive_skb_one_core+0x8b/0xa0\n[19185.927834][ C1] process_backlog+0x88/0x130\n[19185.935840][ C1] __napi_poll+0x27/0x150\n[19185.943447][ C1] net_rx_action+0x27e/0x5f0\n[19185.951331][ C1] ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]\n[19185.960848][ C1] __do_softirq+0xbc/0x25d\n[19185.968607][ C1] irq_exit_rcu+0x83/0xb0\n[19185.976247][ C1] common_interrupt+0x43/0xa0\n[19185.984235][ C1] asm_common_interrupt+0x22/0x40\n...\n[19186.094106][ C1] </TASK>"
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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 - The crash occurs on the inbound UDP softirq path (udp_queue_rcv_skb → __skb_gso_segment → __udp_gso_segment → skb_segment_list) while processing packets received from the network, as shown in the mlx5 NIC call trace; a remote peer can deliver the triggering UDP datagrams.\nAC:L - On a realistic high-performance UDP deployment with rx-gro-list and datapath hooks that pull frag_list (BPF/NAT, as later fraglist fixes document), the attacker only needs to send a burst of aggregatable UDP packets to the listening service and can trigger the NULL deref reliably.\nPR:N - The vulnerable path runs during unauthenticated UDP receive/delivery before any application-level credentials are checked; the attacker needs no local account or capabilities on the target.\nUI:N - Exploitation requires only attacker-sent UDP packets; no victim user action such as mounting a filesystem or opening a file is needed.\nS:U - Impact is confined to the host kernel (oops/panic DoS) and does not cross a VM, IOMMU, or other security authority boundary.\nC:N - The bug is a pure NULL pointer dereference of frag_list with no out-of-bounds read or UAF object control that would disclose memory.\nI:N - The faulting access is a NULL dereference crash only; it does not provide a memory write or control-flow hijack primitive.\nA:H - Dereferencing NULL list_skb in skb_segment_list causes a kernel oops/panic, fully disrupting system availability."
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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/core/skbuff.c"
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],
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"versions": [
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{
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"version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
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"lessThan": "6446369fb9f083ce032448c5047da08e298b22e6",
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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": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
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"lessThan": "046de74f9af92ae9ffce75fa22a1795223f4fb54",
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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": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
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"lessThan": "888dad6f3e85e3b2f8389bd6478f181efc72534d",
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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": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
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"lessThan": "876e8ca8366735a604bac86ff7e2732fc9d85d2d",
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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/core/skbuff.c"
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],
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"versions": [
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{
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"version": "5.6",
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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": "5.6",
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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": "5.10.167",
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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": "5.15.92",
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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": "6.1.10",
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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": "6.2",
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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": "5.6",
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"versionEndExcluding": "5.10.167"
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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": "5.6",
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"versionEndExcluding": "5.15.92"
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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": "5.6",
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"versionEndExcluding": "6.1.10"
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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": "5.6",
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"versionEndExcluding": "6.2"
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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/6446369fb9f083ce032448c5047da08e298b22e6"
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},
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{
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"url": "https://git.kernel.org/stable/c/046de74f9af92ae9ffce75fa22a1795223f4fb54"
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},
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{
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"url": "https://git.kernel.org/stable/c/888dad6f3e85e3b2f8389bd6478f181efc72534d"
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},
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{
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"url": "https://git.kernel.org/stable/c/876e8ca8366735a604bac86ff7e2732fc9d85d2d"
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}
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],
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"title": "net: fix NULL pointer in skb_segment_list",
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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-2023-52991",
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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": "2025-10-01T20:08:20.181820Z"
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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": "2025-10-01T20:17:04.316Z"
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}
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}
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]
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}
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} |