CyberSecBulletin
CVE-2026-64035NVD status: Modified

Linux: Missing Initialization of Resource

Published Updated By the CyberSecBulletin desk

CVE-2026-64035 is a critical-severity missing initialization of resource vulnerability in Linux, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 1f83545f432d106d5fc71d3997b2d382104ebcc4, 1c8587bd025244aa52061f5ceecbf5e68a1063d9, 5acc641e590e008caaed480ed9ffae47cf7ecbdf as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.44% chance of exploitation within 30 days, which is low compared with other CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Linux to 1f83545f432d106d5fc71d3997b2d382104ebcc4 or 1c8587bd025244aa52061f5ceecbf5e68a1063d9 or 5acc641e590e008caaed480ed9ffae47cf7ecbdf, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.18.34 or 7.0.11, whichever matches your release line, or a later version.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux5422570c0010bb968738f9256eb2bf83e79b4d63 up to, but not including, 1f83545f432d106d5fc71d3997b2d382104ebcc4; 5422570c0010bb968738f9256eb2bf83e79b4d63 up to, but not including, 1c8587bd025244aa52061f5ceecbf5e68a1063d9; 5422570c0010bb968738f9256eb2bf83e79b4d63 up to, but not including, 5acc641e590e008caaed480ed9ffae47cf7ecbdf; 6.161f83545f432d106d5fc71d3997b2d382104ebcc4, 1c8587bd025244aa52061f5ceecbf5e68a1063d9, 5acc641e590e008caaed480ed9ffae47cf7ecbdf
LinuxLinux Kernel6.16 up to, but not including, 6.18.34; 6.19 up to, but not including, 7.0.11; 7.16.18.34, 7.0.11

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: igc: set tx buffer type for SMD frames Sashiko pointed out that igc_fpe_init_smd_frame() initializes igc_tx_buffer fields for an SMD skb, but does not set the buffer type: https://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp Since igc_tx_buffer entries are reused, a stale XDP or XSK type can remain and make TX completion use the wrong cleanup path. Set the buffer type to IGC_TX_BUFFER_TYPE_SKB.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Missing Initialization of Resource

The product does not initialize a critical resource.

How developers prevent this class of flaw

  • Explicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all specified steps.
  • Pay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
  • Avoid race conditions (CWE-362) during initialization routines.

More Missing Initialization of Resource vulnerabilities (CWE-909)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Missing Initialization of Resource vulnerabilities

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