cve-2026-64018
CRITICAL CVSS 9.3 opencve
Description
In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array.
Timeline
- Published
- 2026-07-19 16:17 UTC
- Last Modified
- 2026-07-30
CVSS Details
CVSS details not available.
Affected Products
No product information available.
CVSS metrics
| Version | Base | Severity | Vector | Exploitability | Impact | Source |
|---|---|---|---|---|---|---|
| 3.1 | 9.3 | CRITICAL | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
mitre | ||
| 3.1 | 9.3 | CRITICAL | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
nvd | ||
| 3.1 | 9.3 | CRITICAL | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
opencve | ||
| 3.1 | 7.0 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
redhat |
References
No references available.
Linked Vulnerabilities
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"https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae",
"https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c",
"https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84",
"https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27",
"https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0",
"https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-64018-43bb@gregkh/T",
"https://nvd.nist.gov/vuln/detail/CVE-2026-64018",
"https://www.cve.org/CVERecord?id=CVE-2026-64018"
],
"providers": [
"mitre",
"nvd",
"redhat"
]
},
"title": {
"data": "net: mana: validate rx_req_idx to prevent out-of-bounds array access",
"provider": "mitre"
},
"updated": {
"data": "2026-07-26T08:15:04.013030+00:00",
"provider": "enrichment"
},
"vendors": {
"data": [
"linux",
"linux$PRODUCT$linux_kernel"
],
"providers": [
"mitre",
"enrichment"
]
},
"weaknesses": {
"data": [
"CWE-787"
],
"providers": [
"redhat"
]
}
},
"redhat": {
"cpes": [],
"created": "2026-07-19T00:00:00+00:00",
"description": "In the Linux kernel, the following vulnerability has been resolved:\nnet: mana: validate rx_req_idx to prevent out-of-bounds array access\nIn mana_hwc_rx_event_handler(), rx_req_idx is derived from\nsge->address in DMA-coherent memory. In Confidential VMs\n(SEV-SNP/TDX), this memory is shared unencrypted and HW can modify\nWQE contents at any time. No bounds check exists on rx_req_idx,\nwhich can lead to an out-of-bounds access into reqs[].\nAdd bounds check on rx_req_idx in mana_hwc_rx_event_handler() before\nusing it to index the reqs[] array.",
"metrics": {
"cvssV2_0": {},
"cvssV3_0": {},
"cvssV3_1": {
"score": 7.0,
"vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
"threat_severity": "Important"
},
"redhat_repo_path": "2026/CVE-2026-64018.json",
"references": [
"https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-64018-43bb@gregkh/T",
"https://nvd.nist.gov/vuln/detail/CVE-2026-64018",
"https://www.cve.org/CVERecord?id=CVE-2026-64018"
],
"title": "kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access",
"updated": "2026-07-19T00:00:00+00:00",
"vendors": [],
"weaknesses": [
"CWE-787"
]
}
}
Enrichment data
Aggregated bundle (all enrichments)