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NVD / CVE Program· CNA Linux

CVE-2024-27431: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program

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: 0.23% (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 2487007aa3b9fafbd2cb14068f49791ce1d7ede5, 3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95, 5f4e51abfbe6eb444fa91906a5cd083044278297.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 2487007aa3b9fafbd2cb14068f49791ce1d7ede5, 3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95, 5f4e51abfbe6eb444fa91906a5cd083044278297 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: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap. This means we're basically returning the contents of the uninitialised memory, which is bad. Fix this by zero-initialising the rxq data structure before running the XDP program.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 17, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 14th 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.

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-27431

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 kernel5.11 and later · before 5.15.152
  • linux linux kernel5.16 and later · before 6.1.82
  • linux linux kernel5.9 and later · before 5.10.213
  • linux linux kernel6.7 and later · before 6.7.10
  • linux linux kernel6.2 and later · before 6.6.22
  • linux linux kernel6.8

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

    • 5.9affected
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before 5f4e51abfbe6eb444fa91906a5cd083044278297affected · git
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before f0363af9619c77730764f10360e36c6445c12f7baffected · git
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before 3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95affected · git
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before f562e4c4aab00986dde3093c4be919c3f2b85a4aaffected · git
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before eaa7cb836659ced2d9f814ac32aa3ec193803ed6affected · git
    • 9216477449f33cdbc9c9a99d49f500b7fbb81702 and later · before 2487007aa3b9fafbd2cb14068f49791ce1d7ede5affected · git
    • before 5.9not affected · semver
    • 5.10.213 and later · up to and including 5.10.*not affected · semver
    • 5.15.152 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
Debian:12linuxbefore 6.1.82-16.1.82-1
Debian:13linuxbefore 6.7.12-16.7.12-1

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-2024-27408May 17, 2024 · dmaengine: dw-edma: eDMA: Add sync read before starting the DMA transfer in remote setup
    18Monitor
  • ← EarlierCVE-2024-27419May 17, 2024 · netrom: Fix data-races around sysctl_net_busy_read
    18Monitor
  • Later →CVE-2024-27436May 17, 2024 · ALSA: usb-audio: Stop parsing channels bits when all channels are found.
    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 Linux2487007aa3b9fafbd2cb14068f49791ce1d7ede5Vendor (CNA)
Linux Linux3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95Vendor (CNA)
Linux Linux5f4e51abfbe6eb444fa91906a5cd083044278297Vendor (CNA)
Linux Linuxeaa7cb836659ced2d9f814ac32aa3ec193803ed6Vendor (CNA)
Linux Linuxf0363af9619c77730764f10360e36c6445c12f7bVendor (CNA)
Linux Linuxf562e4c4aab00986dde3093c4be919c3f2b85a4aVendor (CNA)
debian:linux6.1.82-1 · Debian:12Package 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-2024-50302186 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2024-47685157 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2021-475537 days apartsched/scs: Reset task stack state in bringup_cpu()
    31Monitor
  • CVE-2024-3689813 days apartgpiolib: cdev: fix uninitialised kfifo
    31Monitor
  • CVE-2024-2702216 days apartfork: defer linking file vma until vma is fully initialized
    31Monitor
  • CVE-2024-50143174 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).

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 (7 more)

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

All records