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NVD / CVE Program· CNA Linux

CVE-2024-27418: net: mctp: take ownership of skb in mctp_local_output

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: 0.22% (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 3773d65ae5154ed7df404b050fd7387a36ab5ef3, a3c8fa54e904b0ddb52a08cc2d8ac239054f61fd, a639441c880ac479495e5ab37e3c29f21ae5771b; cbl2 hyperv-daemons 5.15.158.2-1 on CBL Mariner 2.0 5.15.158.2-1; cbl2 hyperv-daemons 5.15.167.1-1 on CBL Mariner 2.0 5.15.173.1-1.

Low priority for now. Upgrade to Linux Linux 3773d65ae5154ed7df404b050fd7387a36ab5ef3, a3c8fa54e904b0ddb52a08cc2d8ac239054f61fd, a639441c880ac479495e5ab37e3c29f21ae5771b; cbl2 hyperv-daemons 5.15.158.2-1 on CBL Mariner 2.0 5.15.158.2-1; cbl2 hyperv-daemons 5.15.167.1-1 on CBL Mariner 2.0 5.15.173.1-1 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: mctp: take ownership of skb in mctp_local_output Currently, mctp_local_output only takes ownership of skb on success, and we may leak an skb if mctp_local_output fails in specific states; the skb ownership isn't transferred until the actual output routing occurs. Instead, make mctp_local_output free the skb on all error paths up to the route action, so it always consumes the passed skb.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 17, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 12th 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.

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-2024-27418

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

Affected versions

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

  • linux linux kernel5.15 and later · before 6.1.81
  • linux linux kernel6.2 and later · before 6.6.21
  • linux linux kernel6.7 and later · before 6.7.9
  • 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

    • 5.15affected
    • 833ef3b91de692ef33b800bca6b1569c39dece74 and later · before a3c8fa54e904b0ddb52a08cc2d8ac239054f61fdaffected · git
    • 833ef3b91de692ef33b800bca6b1569c39dece74 and later · before cbebc55ceacef1fc0651e80e0103cc184552fc68affected · git
    • 833ef3b91de692ef33b800bca6b1569c39dece74 and later · before a639441c880ac479495e5ab37e3c29f21ae5771baffected · git
    • 833ef3b91de692ef33b800bca6b1569c39dece74 and later · before 3773d65ae5154ed7df404b050fd7387a36ab5ef3affected · git
    • before 5.15not affected · semver
    • 6.1.81 and later · up to and including 6.1.*not affected · semver
    • 6.6.21 and later · up to and including 6.6.*not affected · semver
    • 6.7.9 and later · up to and including 6.7.*not affected · semver
    • 6.8 and laternot affected · original_commit_for_fix

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 6.7.9-16.7.9-1

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-2024-27416May 17, 2024 · Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
    22Monitor
  • ← EarlierCVE-2024-27417May 17, 2024 · ipv6: fix potential "struct net" leak in inet6_rtm_getaddr()
    22Monitor
  • Later →CVE-2023-52659May 17, 2024 · x86/mm: Ensure input to pfn_to_kaddr() is treated as a 64-bit type
    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 Linux3773d65ae5154ed7df404b050fd7387a36ab5ef3Vendor (CNA)
Linux Linuxa3c8fa54e904b0ddb52a08cc2d8ac239054f61fdVendor (CNA)
Linux Linuxa639441c880ac479495e5ab37e3c29f21ae5771bVendor (CNA)
Linux Linuxcbebc55ceacef1fc0651e80e0103cc184552fc68Vendor (CNA)
cbl2 hyperv-daemons 5.15.158.2-1 on CBL Mariner 2.05.15.158.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 hyperv-daemons 5.15.167.1-1 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
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.

No nightly-computed relations.

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-401 · Missing Release of Memory after Effective Lifetime

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 (3 more)

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

All records