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NVD / CVE Program· CNA Linux

CVE-2026-64018: net: mana: validate rx_req_idx to prevent out-of-bounds array access

Noroxi assessment

Priority: Monitor (action score 37/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01, 355e9f2b2a7887ca38100127989af3e422ba71d0, 5ddc715324badd7f2641bc177db1d027b402adae.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01, 355e9f2b2a7887ca38100127989af3e422ba71d0, 5ddc715324badd7f2641bc177db1d027b402adae or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

CriticalCVSS 9.3 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.13 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.142
  • linux linux kernel6.7 and later · before 6.12.92
  • linux linux kernel6.13 and later · before 6.18.34
  • linux linux kernel6.19 and later · before 7.0.11
  • linux linux kernel7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.13affected
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before 5ddc715324badd7f2641bc177db1d027b402adaeaffected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before ff1d5af207bcea857d45fe81505f1bc4b29eaef0affected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01affected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before 763a372d344fb12fae566d36ddb46e92454ad58caffected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before fa627a5eaa83fc0261f44ef3769693b886ca6e27affected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before 355e9f2b2a7887ca38100127989af3e422ba71d0affected · git
    • ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and later · before b809d0409991b75a6cff846a5ac27c3062953f84affected · git
    • before 5.13not affected · semver
    • 5.15.209 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64016Jul 19, 2026 · ksmbd: fix durable reconnect error path file lifetime
    39Monitor
  • ← EarlierCVE-2026-64017Jul 19, 2026 · blk-mq: pop cached request if it is usable
    31Monitor
  • Later →CVE-2026-64019Jul 19, 2026 · nvme-pci: fix dma mapping leak on data setup error
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01Vendor (CNA)
Linux Linux355e9f2b2a7887ca38100127989af3e422ba71d0Vendor (CNA)
Linux Linux5ddc715324badd7f2641bc177db1d027b402adaeVendor (CNA)
Linux Linux763a372d344fb12fae566d36ddb46e92454ad58cVendor (CNA)
Linux Linuxb809d0409991b75a6cff846a5ac27c3062953f84Vendor (CNA)
Linux Linuxfa627a5eaa83fc0261f44ef3769693b886ca6e27Vendor (CNA)
Linux Linuxff1d5af207bcea857d45fe81505f1bc4b29eaef0Vendor (CNA)
almalinux:bpftool4.18.0-553.159.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.159.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel-matched0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo0:6.12.0-211.50.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+4

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4311074 days apartwifi: brcmfmac: validate bsscfg indices in IF events
    35Monitor
  • CVE-2026-4317274 days apartwifi: iwlwifi: fix 22000 series SMEM parsing
    35Monitor
  • CVE-2026-23246123 days apartwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration
    35Monitor
  • CVE-2026-533860 days apartiio: adc: ti-ads1298: add bounds check to pga_settings index
    31Monitor
  • CVE-2026-640360 days apartcgroup/rstat: validate cpu before css_rstat_cpu() access
    31Monitor
  • CVE-2026-642255 days apartocteontx2-af: CGX: add bounds check to cgx_speed_mbps index
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-129 · Improper Validation of Array Index

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records