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NVD / CVE Program· CNA Linux

CVE-2024-36020: i40e: fix vf may be used uninitialized in this function warning

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.25% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 06df7618f591b2dc43c59967e294d7b9fc8675b6, 0dcf573f997732702917af1563aa2493dc772fc0, 3e89846283f3cf7c7a8e28b342576fd7c561d2ba.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 06df7618f591b2dc43c59967e294d7b9fc8675b6, 0dcf573f997732702917af1563aa2493dc772fc0, 3e89846283f3cf7c7a8e28b342576fd7c561d2ba 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: i40e: fix vf may be used uninitialized in this function warning To fix the regression introduced by commit 52424f974bc5, which causes servers hang in very hard to reproduce conditions with resets races. Using two sources for the information is the root cause. In this function before the fix bumping v didn't mean bumping vf pointer. But the code used this variables interchangeably, so stale vf could point to different/not intended vf. Remove redundant "v" variable and iterate via single VF pointer across whole function instead to guarantee VF pointer validity.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 30, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

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

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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Follow CVE-2024-36020

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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
debiandebian linux

Affected versions

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

  • debian debian linux10.0
  • linux linux kernel5.4.223 and later · before 5.4.274
  • linux linux kernel5.10.153 and later · before 5.10.215
  • linux linux kernel5.15.77 and later · before 5.15.154
  • linux linux kernel6.0.7 and later · before 6.1
  • linux linux kernel4.19.264 and later · before 4.19.312
  • linux linux kernel6.2 and later · before 6.6.26
  • linux linux kernel6.7 and later · before 6.8.5
  • linux linux kernel6.1.1 and later · before 6.1.85
  • linux linux kernel6.1
  • linux linux kernel6.9

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

    • 02f949747e6fb767b29f7931d4bbf40911684e7a, 6.1affected
    • 76ed715836c6994bac29d9638e9314e6e3b08651 and later · before cc9cd02dd9e8b7764ea9effb24f4f1dd73d1b23daffected · git
    • e88c2a1e28c5475065563d66c07ca879a9afbd07 and later · before 9dcf0fcb80f6aeb01469e3c957f8d4c97365450aaffected · git
    • 9abae363af5ced6adbf04c14366289540281fb26 and later · before b8e82128b44fa40bf99a50b919488ef361e1683caffected · git
    • c39de3ae5075ea5f78e097cb5720d4e52d5caed9 and later · before 951d2748a2a8242853abc3d0c153ce4bf8faad31affected · git
    • 52424f974bc53c26ba3f00300a00e9de9afcd972 and later · before 3e89846283f3cf7c7a8e28b342576fd7c561d2baaffected · git
    • 52424f974bc53c26ba3f00300a00e9de9afcd972 and later · before 0dcf573f997732702917af1563aa2493dc772fc0affected · git
    • 52424f974bc53c26ba3f00300a00e9de9afcd972 and later · before 06df7618f591b2dc43c59967e294d7b9fc8675b6affected · git
    • 52424f974bc53c26ba3f00300a00e9de9afcd972 and later · before f37c4eac99c258111d414d31b740437e1925b8e8affected · git
    • 4.19.264 and later · before 4.19.312affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.85-16.1.85-1
Debian:13linuxbefore 6.8.9-16.8.9-1
Red Hat:rhel_aus:8.6::baseosbpftoolbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseosbpftool-debuginfobefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernelbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-abi-stablelistsbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-corebefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debugbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debug-corebefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debug-debuginfobefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debug-develbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debug-modulesbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debug-modules-extrabefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debuginfobefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-debuginfo-common-x86_64before 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-develbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-docbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-modulesbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-modules-extrabefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-toolsbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-tools-debuginfobefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseoskernel-tools-libsbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseosperfbefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6
Red Hat:rhel_aus:8.6::baseosperf-debuginfobefore 0:4.18.0-372.113.1.el8_60:4.18.0-372.113.1.el8_6

+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-2024-36958May 30, 2024 · NFSD: Fix nfsd4_encode_fattr4() crasher
    22Monitor
  • ← EarlierCVE-2024-36017May 30, 2024 · rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation
    22Monitor
  • Later →CVE-2024-36881May 30, 2024 · mm/userfaultfd: reset ptes when close() for wr-protected ones
    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 Linux06df7618f591b2dc43c59967e294d7b9fc8675b6Vendor (CNA)
Linux Linux0dcf573f997732702917af1563aa2493dc772fc0Vendor (CNA)
Linux Linux3e89846283f3cf7c7a8e28b342576fd7c561d2baVendor (CNA)
Linux Linux4.19.312Vendor (CNA)
Linux Linux5.10.215Vendor (CNA)
Linux Linux5.15.154Vendor (CNA)
Linux Linux5.4.274Vendor (CNA)
Linux Linux6.1Vendor (CNA)
Linux Linux951d2748a2a8242853abc3d0c153ce4bf8faad31Vendor (CNA)
Linux Linux9dcf0fcb80f6aeb01469e3c957f8d4c97365450aVendor (CNA)
Linux Linuxb8e82128b44fa40bf99a50b919488ef361e1683cVendor (CNA)
Linux Linuxcc9cd02dd9e8b7764ea9effb24f4f1dd73d1b23dVendor (CNA)
Linux Linuxf37c4eac99c258111d414d31b740437e1925b8e8Vendor (CNA)
debian:linux6.1.85-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-372.113.1.el8_6 · Red Hat:rhel_aus:8.6::baseosPackage registry (OSV)

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.

No history yet (it accumulates with the daily EPSS job).

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-2024-50302173 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2024-47685144 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2024-368980 days apartgpiolib: cdev: fix uninitialised kfifo
    31Monitor
  • CVE-2021-475536 days apartsched/scs: Reset task stack state in bringup_cpu()
    31Monitor
  • CVE-2024-2702229 days apartfork: defer linking file vma until vma is fully initialized
    31Monitor
  • CVE-2024-50143161 days apartudf: fix uninit-value use in udf_get_fileshortad
    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.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (10 more)

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

All records