159 lines
8.6 KiB
JSON
159 lines
8.6 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-2026-43208",
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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": "2026-05-01T14:12:55.993Z",
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"datePublished": "2026-05-06T11:28:12.292Z",
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"dateUpdated": "2026-08-05T12:26:35.377Z"
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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": "2026-08-05T12:26:35.377Z"
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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: do not pass flow_id to set_rps_cpu()\n\nBlamed commit made the assumption that the RPS table for each receive\nqueue would have the same size, and that it would not change.\n\nCompute flow_id in set_rps_cpu(), do not assume we can use the value\ncomputed by get_rps_cpu(). Otherwise we risk out-of-bound access\nand/or crashes."
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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 vulnerable `get_rps_cpu()`/`set_rps_cpu()` path is reached while processing received network packets through the generic RX path. In a reasonable high-performance server deployment with RFS/aRFS enabled, a remote peer can drive this path by sending traffic to an exposed service.\nAC:L - Once the affected RFS/aRFS configuration exists, exploitation does not require winning an attacker-uncontrolled race; packets and flows can be generated repeatedly to hit mismatched per-queue flow table indexes. The requirement for RFS/aRFS-capable hardware and configuration is a deployment precondition for the affected subsystem.\nPR:N - The packet-processing trigger itself requires no kernel privileges or authentication from the remote attacker. Enabling/resizing the RPS/RFS tables requires init-namespace `CAP_NET_ADMIN`, but that is administrator configuration, not attacker privilege in the scored network scenario.\nUI:N - No victim user action is required after the network service and RFS/aRFS configuration are present. The vulnerable path runs automatically during packet receive processing.\nS:U - The impact is within the Linux kernel/networking security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - The stale `flow_id` can cause out-of-bounds reads from kernel `rps_dev_flow_table` memory. Because this is kernel memory corruption adjacent to attacker-influenced packet flow state, high confidentiality impact is defensible.\nI:H - The same out-of-bounds `rps_dev_flow` access can write fields such as `filter`, `hash`, `last_qtail`, and `cpu` outside the allocated table. Kernel out-of-bounds write memory corruption is scored as high integrity impact.\nA:H - The fix explicitly cites out-of-bound access and crashes, and an invalid vmalloc-backed table access can oops or panic the kernel. Repeated remote traffic can retrigger the fault on vulnerable configured systems."
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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/dev.c"
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],
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"versions": [
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{
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"version": "48aa30443e52c9666d5cd5e67532e475f212337e",
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"lessThan": "5455a232edea6b946b99449f15ca771a8874a5a6",
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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": "48aa30443e52c9666d5cd5e67532e475f212337e",
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"lessThan": "ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c",
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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": "48aa30443e52c9666d5cd5e67532e475f212337e",
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"lessThan": "8a8a9fac9efa6423fd74938b940cb7d731780718",
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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/dev.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.16",
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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": "6.19.6",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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": "6.18",
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"versionEndExcluding": "6.18.16"
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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": "6.18",
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"versionEndExcluding": "6.19.6"
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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": "6.18",
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"versionEndExcluding": "7.0"
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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/5455a232edea6b946b99449f15ca771a8874a5a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c"
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},
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{
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"url": "https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718"
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}
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],
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"title": "net: do not pass flow_id to set_rps_cpu()",
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"x_generator": {
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} |