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NVD / CVE Program· CNA Linux

CVE-2024-27403: netfilter: nft_flow_offload: reset dst in route object after setting up flow

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 012df10717da02367aaf92c65f9c89db206c15f4, 4c167af9f6b5ae4a5dbc243d5983c295ccc2e43c, 558b00a30e05753a62ecc7e05e939ca8f0241148.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 012df10717da02367aaf92c65f9c89db206c15f4, 4c167af9f6b5ae4a5dbc243d5983c295ccc2e43c, 558b00a30e05753a62ecc7e05e939ca8f0241148 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: netfilter: nft_flow_offload: reset dst in route object after setting up flow dst is transferred to the flow object, route object does not own it anymore. Reset dst in route object, otherwise if flow_offload_add() fails, error path releases dst twice, leading to a refcount underflow.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 17, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 14th percentile
CWE
—

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-2024-27403

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 kernel4.16 and later · before 5.15.150
  • linux linux kernel5.16 and later · before 6.1.80
  • linux linux kernel6.2 and later · before 6.6.19
  • linux linux kernel6.7 and later · before 6.7.7
  • 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

    • 4.16affected
    • a3c90f7a2323b331ae816d5b0633e68148e25d04 and later · before 4c167af9f6b5ae4a5dbc243d5983c295ccc2e43caffected · git
    • a3c90f7a2323b331ae816d5b0633e68148e25d04 and later · before 012df10717da02367aaf92c65f9c89db206c15f4affected · git
    • a3c90f7a2323b331ae816d5b0633e68148e25d04 and later · before 558b00a30e05753a62ecc7e05e939ca8f0241148affected · git
    • a3c90f7a2323b331ae816d5b0633e68148e25d04 and later · before 670548c8db44d76e40e1dfc06812bca36a61e9aeaffected · git
    • a3c90f7a2323b331ae816d5b0633e68148e25d04 and later · before 9e0f0430389be7696396c62f037be4bf72cf93e3affected · git
    • before 4.16not affected · semver
    • 5.15.150 and later · up to and including 5.15.*not affected · semver
    • 6.1.80 and later · up to and including 6.1.*not affected · semver
    • 6.6.19 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9bpftoolbefore 7.3.0-427.40.1.el9_47.3.0-427.40.1.el9_4
AlmaLinux:9kernelbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64kbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debugbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-develbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-cross-headersbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-debugbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-debug-corebefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-debug-develbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-427.40.1.el9_45.14.0-427.40.1.el9_4

+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-2023-52658May 17, 2024 · Revert "net/mlx5: Block entering switchdev mode with ns inconsistency"
    22Monitor
  • ← EarlierCVE-2024-27402May 17, 2024 · phonet/pep: fix racy skb_queue_empty() use
    23Monitor
  • Later →CVE-2024-27404May 17, 2024 · mptcp: fix data races on remote_id
    18Monitor

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 Linux012df10717da02367aaf92c65f9c89db206c15f4Vendor (CNA)
Linux Linux4c167af9f6b5ae4a5dbc243d5983c295ccc2e43cVendor (CNA)
Linux Linux558b00a30e05753a62ecc7e05e939ca8f0241148Vendor (CNA)
Linux Linux670548c8db44d76e40e1dfc06812bca36a61e9aeVendor (CNA)
Linux Linux9e0f0430389be7696396c62f037be4bf72cf93e3Vendor (CNA)
almalinux:bpftool7.3.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-427.40.1.el9_4 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-core0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-core0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-extra0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo0:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo-common-x86_640:5.14.0-284.71.1.rt14.356.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)

+1

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)

—

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 (4 more)

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

All records