CVE-2026-46306: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vm8v-fr63-mfh4
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CVSS 7.5
CWE-198
Published
Advisory Summary

CVE-2026-46306 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-198: Use of Incorrect Byte Ordering) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives input from an upstream component, but it does not account for byte ordering (e.g. big-endian and little-endian) when processing the input, causing an incorrect number or value to be used.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-46306 at a Glance

CVE Identifier CVE-2026-46306
GHSA Identifier GHSA-vm8v-fr63-mfh4
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-198: Use of Incorrect Byte Ordering
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-46306

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-46306, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-198: Use of Incorrect Byte Ordering, where the product receives input from an upstream component, but it does not account for byte ordering (e.g. big-endian and little-endian) when processing the input, causing an incorrect number or value to be used. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: flow_dissector: do not dissect PPPoE PFC frames RFC 2516 Section 7 states that Protocol Field Compression (PFC) is NOT RECOMMENDED for PPPoE. In practice, pppd does not support negotiating PFC for PPPoE sessions, and the flow dissector driver has assumed an uncompressed frame until the blamed commit. During the review process of that commit [1], support for PFC is suggested. However, having a compressed (1-byte) protocol field means the subsequent PPP payload is shifted by one byte, causing 4-byte misalignment for the network header and an unaligned access exception on some architectures. The exception can be reproduced by sending a PPPoE PFC frame to an ethernet interface of a MIPS board, with RPS enabled, even if no PPPoE session is active on that interface: $ 0 : 00000000 80c40000 00000000 85144817 $ 4 : 00000008 00000100 80a75758 81dc9bb8 $ 8 : 00000010 8087ae2c 0000003d 00000000 $12 : 000000e0 00000039 00000000 00000000 $16 : 85043240 80a75758 81dc9bb8 00006488 $20 : 0000002f 00000007 85144810 80a70000 $24 : 81d1bda0 00000000 $28 : 81dc8000 81dc9aa8 00000000 805ead08 Hi : 00009d51 Lo : 2163358a epc : 805e91f0 __skb_flow_dissect+0x1b0/0x1b50 ra : 805ead08 __skb_get_hash_net+0x74/0x12c Status: 11000403 KERNEL EXL IE Cause : 40800010 (ExcCode 04) BadVA : 85144817 PrId : 0001992f (MIPS 1004Kc) Call Trace: [<805e91f0>] __skb_flow_dissect+0x1b0/0x1b50 [<805ead08>] __skb_get_hash_net+0x74/0x12c [<805ef330>] get_rps_cpu+0x1b8/0x3fc [<805fca70>] netif_receive_skb_list_internal+0x324/0x364 [<805fd120>] napi_complete_done+0x68/0x2a4 [<8058de5c>] mtk_napi_rx+0x228/0xfec [<805fd398>] __napi_poll+0x3c/0x1c4 [<805fd754>] napi_threaded_poll_loop+0x234/0x29c [<805fd848>] napi_threaded_poll+0x8c/0xb0 [<80053544>] kthread+0x104/0x12c [<80002bd8>] ret_from_kernel_thread+0x14/0x1c Code: 02d51821 1060045b 00000000 <8c640000> 3084000f 2c820005 144001a2 00042080 8e220000 To reduce the attack surface and maintain performance, do not process PPPoE PFC frames. [1] https://lore.kernel.org/r/20220630231016.GA392@debian.home

References

NVD — CVE-2026-46306 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46306
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/0d00b90150... WEB
https://git.kernel.org/stable/c/0d00b9015069712944934bab09eaa6c542143049
git.kernel.org/stable/c/18ae9eacfc... WEB
https://git.kernel.org/stable/c/18ae9eacfc95cc715c0606b2c86e8aa8a86cf3e3
git.kernel.org/stable/c/6044392d9c... WEB
https://git.kernel.org/stable/c/6044392d9cace3a3672b02c8bc7d38b502e51734
git.kernel.org/stable/c/7c93f353ea... WEB
https://git.kernel.org/stable/c/7c93f353eab4ea911e394630f07d72e040a729d8
git.kernel.org/stable/c/abc5bc84e0... WEB
https://git.kernel.org/stable/c/abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200
git.kernel.org/stable/c/d6c19b31a3... WEB
https://git.kernel.org/stable/c/d6c19b31a3c1d519fabdcf0aa239e6b6109b9473
git.kernel.org/stable/c/db104b0d8a... WEB
https://git.kernel.org/stable/c/db104b0d8a7856397c0469d83a4289adf7c54863
git.kernel.org/stable/c/e7c811ca37... WEB
https://git.kernel.org/stable/c/e7c811ca372d53c2be7d01a1614e71fae1054836

Frequently Asked Questions

What is CVE-2026-46306?
CVE-2026-46306 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-198: Use of Incorrect Byte Ordering.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-46306?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-46306?
CVE-2026-46306 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-46306?
CVE-2026-46306 is classified under CWE-198: Use of Incorrect Byte Ordering (The product receives input from an upstream component, but it does not account for byte ordering (e.g. big-endian and little-endian) when processing the input, causing an incorrect number or value to be used.).
How can I check Maven dependencies for CVE-2026-46306?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "id" : "GHSA-vm8v-fr63-mfh4",
  "modified" : "2026-10-15T03:36:07Z",
  "published" : "2026-06-08T18:31:52Z",
  "aliases" : [ "CVE-2026-46306" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nflow_dissector: do not dissect PPPoE PFC frames\n\nRFC 2516 Section 7 states that Protocol Field Compression (PFC) is NOT\nRECOMMENDED for PPPoE. In practice, pppd does not support negotiating\nPFC for PPPoE sessions, and the flow dissector driver has assumed an\nuncompressed frame until the blamed commit.\n\nDuring the review process of that commit [1], support for PFC is\nsuggested. However, having a compressed (1-byte) protocol field means\nthe subsequent PPP payload is shifted by one byte, causing 4-byte\nmisalignment for the network header and an unaligned access exception\non some architectures.\n\nThe exception can be reproduced by sending a PPPoE PFC frame to an\nethernet interface of a MIPS board, with RPS enabled, even if no PPPoE\nsession is active on that interface:\n\n$ 0   : 00000000 80c40000 00000000 85144817\n$ 4   : 00000008 00000100 80a75758 81dc9bb8\n$ 8   : 00000010 8087ae2c 0000003d 00000000\n$12   : 000000e0 00000039 00000000 00000000\n$16   : 85043240 80a75758 81dc9bb8 00006488\n$20   : 0000002f 00000007 85144810 80a70000\n$24   : 81d1bda0 00000000\n$28   : 81dc8000 81dc9aa8 00000000 805ead08\nHi    : 00009d51\nLo    : 2163358a\nepc   : 805e91f0 __skb_flow_dissect+0x1b0/0x1b50\nra    : 805ead08 __skb_get_hash_net+0x74/0x12c\nStatus: 11000403        KERNEL EXL IE\nCause : 40800010 (ExcCode 04)\nBadVA : 85144817\nPrId  : 0001992f (MIPS 1004Kc)\nCall Trace:\n[<805e91f0>] __skb_flow_dissect+0x1b0/0x1b50\n[<805ead08>] __skb_get_hash_net+0x74/0x12c\n[<805ef330>] get_rps_cpu+0x1b8/0x3fc\n[<805fca70>] netif_receive_skb_list_internal+0x324/0x364\n[<805fd120>] napi_complete_done+0x68/0x2a4\n[<8058de5c>] mtk_napi_rx+0x228/0xfec\n[<805fd398>] __napi_poll+0x3c/0x1c4\n[<805fd754>] napi_threaded_poll_loop+0x234/0x29c\n[<805fd848>] napi_threaded_poll+0x8c/0xb0\n[<80053544>] kthread+0x104/0x12c\n[<80002bd8>] ret_from_kernel_thread+0x14/0x1c\n\nCode: 02d51821  1060045b  00000000 <8c640000> 3084000f  2c820005  144001a2  00042080  8e220000\n\nTo reduce the attack surface and maintain performance, do not process\nPPPoE PFC frames.\n\n[1] https://lore.kernel.org/r/20220630231016.GA392@debian.home",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
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  }, {
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    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
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    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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    "url" : "https://git.kernel.org/stable/c/6044392d9cace3a3672b02c8bc7d38b502e51734"
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    "url" : "https://git.kernel.org/stable/c/7c93f353eab4ea911e394630f07d72e040a729d8"
  }, {
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    "url" : "https://git.kernel.org/stable/c/abc5bc84e0f2edc7ea2d437afa6ef3fe1fc43200"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d6c19b31a3c1d519fabdcf0aa239e6b6109b9473"
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    "url" : "https://git.kernel.org/stable/c/db104b0d8a7856397c0469d83a4289adf7c54863"
  }, {
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    "url" : "https://git.kernel.org/stable/c/e7c811ca372d53c2be7d01a1614e71fae1054836"
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}