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NVD / CVE Program· CNA Linux

CVE-2024-50038: netfilter: xtables: avoid NFPROTO_UNSPEC where needed

MediumCVSS 5.5 · v3.1—No exploit Fix available

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 0bfcb7b71e735560077a42847f69597ec7dcc326, 4cdc55ec6222bb195995cc58f7cb46e4d8907056, 85ff9a0f793ca52c527e75cd40a69c948627ebde; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.57.1-1; azl3 kernel 6.6.57.1-1 on Azure Linux 3.0 6.6.57.1-1.

Low priority for now. Upgrade to Linux Linux 0bfcb7b71e735560077a42847f69597ec7dcc326, 4cdc55ec6222bb195995cc58f7cb46e4d8907056, 85ff9a0f793ca52c527e75cd40a69c948627ebde; azl3 kernel 6.6.56.1-5 on Azure Linux 3.0 6.6.57.1-1; azl3 kernel 6.6.57.1-1 on Azure Linux 3.0 6.6.57.1-1 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: netfilter: xtables: avoid NFPROTO_UNSPEC where needed syzbot managed to call xt_cluster match via ebtables: WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780 [..] ebt_do_table+0x174b/0x2a40 Module registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet processing. As this is only useful to restrict locally terminating TCP/UDP traffic, register this for ipv4 and ipv6 family only. Pablo points out that this is a general issue, direct users of the set/getsockopt interface can call into targets/matches that were only intended for use with ip(6)tables. Check all UNSPEC matches and targets for similar issues: - matches and targets are fine except if they assume skb_network_header() is valid -- this is only true when called from inet layer: ip(6) stack pulls the ip/ipv6 header into linear data area. - targets that return XT_CONTINUE or other xtables verdicts must be restricted too, they are incompatbile with the ebtables traverser, e.g. EBT_CONTINUE is a completely different value than XT_CONTINUE. Most matches/targets are changed to register for NFPROTO_IPV4/IPV6, as they are provided for use by ip(6)tables. The MARK target is also used by arptables, so register for NFPROTO_ARP too. While at it, bail out if connbytes fails to enable the corresponding conntrack family. This change passes the selftests in iptables.git.

Published
Oct 21, 2024
Updated
Jun 17, 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.

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

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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

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

    • 2.6.30affected
    • 0269ea4937343536ec7e85649932bc8c9686ea78 and later · before 85ff9a0f793ca52c527e75cd40a69c948627ebdeaffected · git
    • 0269ea4937343536ec7e85649932bc8c9686ea78 and later · before 8f482bb7e27b37f1f734bb9a8eeb28b23d59d189affected · git
    • 0269ea4937343536ec7e85649932bc8c9686ea78 and later · before 997f67d813ce0cf5eb3cdb8f124da68141e91b6caffected · git
    • 0269ea4937343536ec7e85649932bc8c9686ea78 and later · before 4cdc55ec6222bb195995cc58f7cb46e4d8907056affected · git
    • 0269ea4937343536ec7e85649932bc8c9686ea78 and later · before 0bfcb7b71e735560077a42847f69597ec7dcc326affected · git
    • before 2.6.30not affected · semver
    • 5.15.168 and later · up to and including 5.15.*not affected · semver
    • 6.1.113 and later · up to and including 6.1.*not affected · semver
    • 6.6.57 and later · up to and including 6.6.*not affected · semver
Affected versions · NVD (5)

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

  • linux linux kernel2.6.30 and later · before 5.15.168
  • linux linux kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.57
  • linux linux kernel6.7 and later · before 6.11.4
  • linux linux kernel6.12

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.4-16.11.4-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.37.16.4.0-150600.8.37.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.50.1.150600.12.22.16.4.0-150600.23.50.1.150600.12.22.1
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-rt_debugbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.37.16.4.0-150600.8.37.1
openSUSE:Leap 15.6kernel-source-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.37.16.4.0-150600.8.37.1
openSUSE:Leap 15.6kernel-syms-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_11before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6-RT_Update_11before 1-150600.1.3.21-150600.1.3.2
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-64kbbefore 6.4.0-150600.23.50.16.4.0-150600.23.50.1

+17

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-2024-50036Oct 21, 2024 · net: do not delay dst_entries_add() in dst_release()
    28Monitor
  • ← EarlierCVE-2024-50037Oct 21, 2024 · drm/fbdev-dma: Only cleanup deferred I/O if necessary
    22Monitor
  • Later →CVE-2024-50041Oct 21, 2024 · i40e: Fix macvlan leak by synchronizing access to mac_filter_hash
    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 Linux0bfcb7b71e735560077a42847f69597ec7dcc326Vendor (CNA)
Linux Linux4cdc55ec6222bb195995cc58f7cb46e4d8907056Vendor (CNA)
Linux Linux85ff9a0f793ca52c527e75cd40a69c948627ebdeVendor (CNA)
Linux Linux8f482bb7e27b37f1f734bb9a8eeb28b23d59d189Vendor (CNA)
Linux Linux997f67d813ce0cf5eb3cdb8f124da68141e91b6cVendor (CNA)
azl3 kernel 6.6.56.1-5 on Azure Linux 3.06.6.57.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.57.1-1 on Azure Linux 3.06.6.57.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.115-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.50.1.150600.12.22.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-zfcpdump6.4.0-150600.23.50.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.50.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.37.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150600.23.50.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.50.1.150600.12.22.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-docs6.4.0-150600.23.50.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_111-150600.13.3.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-obs-build6.4.0-150600.23.50.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)

+5

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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (5 more)

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

All records