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NVD / CVE Program· CNA Linux

CVE-2024-26673: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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 0f501dae16b7099e69ee9b0d5c70b8f40fd30e98, 38cc1605338d99205a263707f4dde76408d3e0e8, 65ee90efc928410c6f73b3d2e0afdd762652c09d.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0f501dae16b7099e69ee9b0d5c70b8f40fd30e98, 38cc1605338d99205a263707f4dde76408d3e0e8, 65ee90efc928410c6f73b3d2e0afdd762652c09d 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_ct: sanitize layer 3 and 4 protocol number in custom expectations - Disallow families other than NFPROTO_{IPV4,IPV6,INET}. - Disallow layer 4 protocol with no ports, since destination port is a mandatory attribute for this object.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Apr 2, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 14th percentile
CWE
—

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 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-2024-26673

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 kernel5.5 and later · before 5.10.210
  • linux linux kernel5.11 and later · before 5.15.149
  • linux linux kernel5.16 and later · before 6.1.77
  • linux linux kernel5.3 and later · before 5.4.269
  • linux linux kernel6.7 and later · before 6.7.4
  • linux linux kernel6.2 and later · before 6.6.16
  • 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

    • 5.3affected
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before f549f340c91f08b938d60266e792ff7748dae483affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 65ee90efc928410c6f73b3d2e0afdd762652c09daffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before b775ced05489f4b77a35fe203e9aeb22f428e38faffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 0f501dae16b7099e69ee9b0d5c70b8f40fd30e98affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before cfe3550ea5df292c9e2d608e8c4560032391847eaffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 38cc1605338d99205a263707f4dde76408d3e0e8affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 8059918a1377f2f1fff06af4f5a4ed3d5acd6bc4affected · git
    • before 5.3not affected · semver
    • 5.4.269 and later · up to and including 5.4.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9bpftoolbefore 7.3.0-427.18.1.el9_47.3.0-427.18.1.el9_4
AlmaLinux:9kernelbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64kbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debugbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-develbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-cross-headersbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-debugbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-debug-corebefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-debug-develbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.el9_4
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-427.18.1.el9_45.14.0-427.18.1.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-2024-26668Apr 2, 2024 · netfilter: nft_limit: reject configurations that cause integer overflow
    22Monitor
  • ← EarlierCVE-2024-26672Apr 2, 2024 · drm/amdgpu: Fix variable 'mca_funcs' dereferenced before NULL check in 'amdgpu_mca_smu_get_mca_entry()'
    28Monitor
  • Later →CVE-2024-26674Apr 2, 2024 · x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups
    28Monitor

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 Linux0f501dae16b7099e69ee9b0d5c70b8f40fd30e98Vendor (CNA)
Linux Linux38cc1605338d99205a263707f4dde76408d3e0e8Vendor (CNA)
Linux Linux65ee90efc928410c6f73b3d2e0afdd762652c09dVendor (CNA)
Linux Linux8059918a1377f2f1fff06af4f5a4ed3d5acd6bc4Vendor (CNA)
Linux Linuxb775ced05489f4b77a35fe203e9aeb22f428e38fVendor (CNA)
Linux Linuxcfe3550ea5df292c9e2d608e8c4560032391847eVendor (CNA)
Linux Linuxf549f340c91f08b938d60266e792ff7748dae483Vendor (CNA)
almalinux:bpftool7.3.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-427.18.1.el9_4 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.3.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-427.18.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+2

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).

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
high · data can be read
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
High
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:H/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