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NVD / CVE Program· CNA Linux

CVE-2024-38558: net: openvswitch: fix overwriting ct original tuple for ICMPv6

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: 0.82% (FIRST EPSS); higher than 57.3% of all records.
  • 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 0b532f59437f688563e9c58bdc1436fefa46e3b5, 431e9215576d7b728f3f53a704d237a520092120, 483eb70f441e2df66ade78aa7217e6e4caadfef3.
  • Severity is disputed: the assigning authority (CNA) scores it 10.0, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 0b532f59437f688563e9c58bdc1436fefa46e3b5, 431e9215576d7b728f3f53a704d237a520092120, 483eb70f441e2df66ade78aa7217e6e4caadfef3 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: openvswitch: fix overwriting ct original tuple for ICMPv6 OVS_PACKET_CMD_EXECUTE has 3 main attributes: - OVS_PACKET_ATTR_KEY - Packet metadata in a netlink format. - OVS_PACKET_ATTR_PACKET - Binary packet content. - OVS_PACKET_ATTR_ACTIONS - Actions to execute on the packet. OVS_PACKET_ATTR_KEY is parsed first to populate sw_flow_key structure with the metadata like conntrack state, input port, recirculation id, etc. Then the packet itself gets parsed to populate the rest of the keys from the packet headers. Whenever the packet parsing code starts parsing the ICMPv6 header, it first zeroes out fields in the key corresponding to Neighbor Discovery information even if it is not an ND packet. It is an 'ipv6.nd' field. However, the 'ipv6' is a union that shares the space between 'nd' and 'ct_orig' that holds the original tuple conntrack metadata parsed from the OVS_PACKET_ATTR_KEY. ND packets should not normally have conntrack state, so it's fine to share the space, but normal ICMPv6 Echo packets or maybe other types of ICMPv6 can have the state attached and it should not be overwritten. The issue results in all but the last 4 bytes of the destination address being wiped from the original conntrack tuple leading to incorrect packet matching and potentially executing wrong actions in case this packet recirculates within the datapath or goes back to userspace. ND fields should not be accessed in non-ND packets, so not clearing them should be fine. Executing memset() only for actual ND packets to avoid the issue. Initializing the whole thing before parsing is needed because ND packet may not contain all the options. The issue only affects the OVS_PACKET_CMD_EXECUTE path and doesn't affect packets entering OVS datapath from network interfaces, because in this case CT metadata is populated from skb after the packet is already parsed.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 19, 2024
Updated
Oct 15, 2026
EPSS
0.8% · 57th 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 · 0.8%

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
10.0
4.5 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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

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Follow CVE-2024-38558

When you'll hear from us

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  • 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 kernel4.11 and later · before 4.19.316
  • linux linux kernel4.20 and later · before 5.4.278
  • linux linux kernel5.5 and later · before 5.10.219
  • linux linux kernel5.11 and later · before 5.15.161
  • linux linux kernel5.16 and later · before 6.1.93
  • linux linux kernel6.2 and later · before 6.6.33
  • linux linux kernel6.7 and later · before 6.8.12
  • linux linux kernel6.9 and later · before 6.9.3

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

    • 4.11affected
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 6a51ac92bf35d34b4996d6eb67e2fe469f573b11affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 0b532f59437f688563e9c58bdc1436fefa46e3b5affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 5ab6aecbede080b44b8e34720ab72050bf1e6982affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 483eb70f441e2df66ade78aa7217e6e4caadfef3affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 9ec8b0ccadb908d92f7ee211a4eff05fd932f3f6affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 78741b4caae1e880368cb2f5110635f3ce45ecfdaffected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 431e9215576d7b728f3f53a704d237a520092120affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before d73fb8bddf89503c9fae7c42e50d44c89909aad6affected · git
    • 9dd7f8907c3705dc7a7a375d1c6e30b06e6daffc and later · before 7c988176b6c16c516474f6fceebe0f055af5eb56affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.94-16.1.94-1
Debian:13linuxbefore 6.8.12-16.8.12-1
Red Hat:rhel_eus:8.8::baseosbpftoolbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseosbpftool-debuginfobefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernelbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-abi-stablelistsbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-corebefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debugbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debug-corebefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debug-debuginfobefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debug-develbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debug-modulesbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debug-modules-extrabefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debuginfobefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debuginfo-common-aarch64before 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debuginfo-common-ppc64lebefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debuginfo-common-s390xbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-debuginfo-common-x86_64before 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-develbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-docbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-modulesbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-modules-extrabefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-toolsbefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8
Red Hat:rhel_eus:8.8::baseoskernel-tools-debuginfobefore 0:4.18.0-477.75.1.el8_80:4.18.0-477.75.1.el8_8

+87

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-2024-38552Jun 19, 2024 · drm/amd/display: Fix potential index out of bounds in color transformation function
    31Monitor
  • ← EarlierCVE-2024-38557Jun 19, 2024 · net/mlx5: Reload only IB representors upon lag disable/enable
    22Monitor
  • Later →CVE-2024-38559Jun 19, 2024 · scsi: qedf: Ensure the copied buf is NUL terminated
    17Monitor

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 Linux0b532f59437f688563e9c58bdc1436fefa46e3b5Vendor (CNA)
Linux Linux431e9215576d7b728f3f53a704d237a520092120Vendor (CNA)
Linux Linux483eb70f441e2df66ade78aa7217e6e4caadfef3Vendor (CNA)
Linux Linux5ab6aecbede080b44b8e34720ab72050bf1e6982Vendor (CNA)
Linux Linux6a51ac92bf35d34b4996d6eb67e2fe469f573b11Vendor (CNA)
Linux Linux78741b4caae1e880368cb2f5110635f3ce45ecfdVendor (CNA)
Linux Linux7c988176b6c16c516474f6fceebe0f055af5eb56Vendor (CNA)
Linux Linux9ec8b0ccadb908d92f7ee211a4eff05fd932f3f6Vendor (CNA)
Linux Linuxd73fb8bddf89503c9fae7c42e50d44c89909aad6Vendor (CNA)
debian:linux6.1.94-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.0.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-284.86.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage 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-2021-4719470 days apartcfg80211: call cfg80211_stop_ap when switch from P2P_GO type
    31Monitor
  • CVE-2023-52452118 days apartbpf: Fix accesses to uninit stack slots
    31Monitor
  • CVE-2024-393016 days apartnet/9p: fix uninit-value in p9_client_rpc()
    22Monitor
  • CVE-2024-3948516 days apartmedia: v4l: async: Properly re-initialise notifier entry in unregister
    22Monitor
  • CVE-2024-4207840 days apartnfsd: initialise nfsd_info.mutex early.
    22Monitor
  • CVE-2024-4494775 days apartfuse: Initialize beyond-EOF page contents before setting uptodate
    22Monitor

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-665 · Improper Initialization

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (11 more)

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

All records