CVE-2026-64035Network attack vector

Memory corruption via stale TX buffer type

Published Jul 19, 2026 · Updated Jul 19, 2026

Memory corruption in the Linux kernel igc driver 6.16 allows remote attackers to corrupt kernel memory or crash hosts via network access. igc_fpe_init_smd_frame() reuses an igc_tx_buffer without setting its type, allowing stale XDP or XSK state to select the wrong TX-completion cleanup path for an SMD skb. Reachability requires the igc frame-preemption verification path, but the public record does not identify the exact network stimulus.

CVSS severity9.8
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux kernel igc driver 6.16 allows remote attackers to corrupt kernel memory or crash hosts via network access. igc_fpe_init_smd_frame() reuses an igc_tx_buffer without setting its type, allowing stale XDP or XSK state to select the wrong TX-completion cleanup path for an SMD skb. Reachability requires the igc frame-preemption verification path, but the public record does not identify the exact network stimulus.

The record

CVE
CVE-2026-64035
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-909
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5422570c0010bb968738f9256eb2bf83e79b4d63 <1c8587bd025244aa52061f5ceecbf5e68a1063d9
  2. Affected versionversion=5422570c0010bb968738f9256eb2bf83e79b4d63 <1f83545f432d106d5fc71d3997b2d382104ebcc4
  3. Affected versionversion=5422570c0010bb968738f9256eb2bf83e79b4d63 <5acc641e590e008caaed480ed9ffae47cf7ecbdf
  4. Affected versionversion=6.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5422570c0010bb968738f9256eb2bf83e79b4d63 <1c8587bd025244aa52061f5ceecbf5e68a1063d9; version=5422570c0010bb968738f9256eb2bf83e79b4d63 <1f83545f432d106d5fc71d3997b2d382104ebcc4; version=5422570c0010bb968738f9256eb2bf83e79b4d63 <5acc641e590e008caaed480ed9ffae47cf7ecbdf; version=6.16

Published CVSS scores

9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-909Missing Initialization of Resource

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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