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NVD / CVE Program· CNA Linux

CVE-2026-46266: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP

Noroxi assessment

Priority: Monitor (action score 36/100)

  • 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: 0.46% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 19e42490c89bac9a388f28179e66bebbef350f99, 47276297140ee6712646f9b19fb04fe26daedd01, 531c1aec81bfe19d00af13da5531fbb8209e4bd2.

Low priority for now. Upgrade to Linux Linux 19e42490c89bac9a388f28179e66bebbef350f99, 47276297140ee6712646f9b19fb04fe26daedd01, 531c1aec81bfe19d00af13da5531fbb8209e4bd2 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: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AF_INET, SOCK_RAW, 255); A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes. inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner "man 7 raw" states: A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets. Make sure we drop these malicious packets.

CriticalCVSS 9.1 · v3.1—No exploit Fix available
Published
Jun 3, 2026
Updated
Oct 19, 2026
EPSS
0.4% · 40th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • 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.

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  • when exploit code appears or is weaponized
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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 kernel2.6.12.1 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.14
  • linux linux kernel6.19 and later · before 6.19.4
  • linux linux kernel2.6.12

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 47276297140ee6712646f9b19fb04fe26daedd01affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before db76b75ede3810e7cf9cfea5067d4f3e0993768baffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 19e42490c89bac9a388f28179e66bebbef350f99affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 531c1aec81bfe19d00af13da5531fbb8209e4bd2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 719d3932b8f6e3348ce2f0ac58e278301fc17575affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c89477ad79446867394360b29bb801010fc3ff22affected · git
    • before 2.6.12not affected · semver
    • 6.1.187 and later · up to and including 6.1.*not affected · semver
    • 6.6.128 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:8bpftoolbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.164.1.el8_104.18.0-553.164.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.164.1.rt7.505.el8_104.18.0-553.164.1.rt7.505.el8_10

+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-2026-46263Jun 3, 2026 · drm/amd/display: Fix out-of-bounds stream encoder index v3
    31Monitor
  • ← EarlierCVE-2026-46265Jun 3, 2026 · RDMA/hns: Fix WQ_MEM_RECLAIM warning
    30Monitor
  • Later →CVE-2026-46271Jun 3, 2026 · wifi: ath12k: do WoW offloads only on primary link
    31Monitor

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 Linux19e42490c89bac9a388f28179e66bebbef350f99Vendor (CNA)
Linux Linux47276297140ee6712646f9b19fb04fe26daedd01Vendor (CNA)
Linux Linux531c1aec81bfe19d00af13da5531fbb8209e4bd2Vendor (CNA)
Linux Linux719d3932b8f6e3348ce2f0ac58e278301fc17575Vendor (CNA)
Linux Linuxc89477ad79446867394360b29bb801010fc3ff22Vendor (CNA)
Linux Linuxdb76b75ede3810e7cf9cfea5067d4f3e0993768bVendor (CNA)
almalinux:kernel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.46.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel-matched0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo0:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo-common-aarch640:6.12.0-211.52.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+15

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-2026-461156 days apartblock: add pgmap check to biovec_phys_mergeable
    39Monitor
  • CVE-2026-5322122 days apartip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
    39Monitor
  • CVE-2026-6403746 days apartwifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled
    39Monitor
  • CVE-2026-6404646 days apartnet: tls: prevent chain-after-chain in plain text SG
    39Monitor
  • CVE-2026-4311428 days apartnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
    37Monitor
  • CVE-2026-6410646 days apartKVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits
    36Monitor

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records