net: mana: validate rx_req_idx to prevent out-of-bounds array access
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.
CVE-2026-64018
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64018
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "5ddc715324badd7f2641bc177db1d027b402adae",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "ff1d5af207bcea857d45fe81505f1bc4b29eaef0",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "763a372d344fb12fae566d36ddb46e92454ad58c",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "fa627a5eaa83fc0261f44ef3769693b886ca6e27",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "355e9f2b2a7887ca38100127989af3e422ba71d0",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
"lessThan": "b809d0409991b75a6cff846a5ac27c3062953f84",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/microsoft/mana/hw_channel.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/microsoft/mana/hw_channel.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64018
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40935 · Revision 1
- Added to Heist Feed
- Publisher date