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VulnerabilityPublished Updated

CVE-2026-98347: Linux kernel · IB/IPoIB: Avoid restoring OPER_UP after multicast flush

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in f973769fb7cb33ba0d4a64b7dcfee0cabaead938 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f973769fb7cb33ba0d4a64b7dcfee0cabaead938, b72f38929f4b5aa83161fd3b22a7327207e51ec5, 326f7d34bd7e64de535566b65c0533b640df5a81 +11

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=3.2.84 <3.3
  • >=3.10.105 <3.11
  • >=3.12.65 <3.13
  • >=3.16.39 <3.17
  • >=4.4.24 <4.5
  • >=4.7.7 <4.8
Fixed in
  • f973769fb7cb33ba0d4a64b7dcfee0cabaead938
  • b72f38929f4b5aa83161fd3b22a7327207e51ec5
  • 326f7d34bd7e64de535566b65c0533b640df5a81
  • 188b334a6db36a8e0bfaaf59bc4020639a0f3aad
  • 9a141d3dc869d18b2eab35e999f4790a9b84e40f
  • 5ad925d45f28464a5e043c9620880bb6a030da89
  • 4.8
  • 4.5
  • 3.17
  • 3.13
  • 3.11
  • 3.3
  • 1ff3add37c329704ec46181b4ae4f00f9f16ce6f
  • 1b11e4b55b41d9e69a8e8d07622614202e2eaca9
LinuxLinuxAffected
  • =4.8
Fixed in–

AI-suggested

A fix is available and has been applied in Linux kernel versions 3.13, 3.17, 4.5, and 4.8 and corresponding commit hashes. Users should upgrade to these or later fixed versions to resolve the issue. No additional mitigation is required once the system is updated.

Description

A race condition in the Linux kernel's IB/IPoIB driver caused a deadlock during device shutdown due to improper flag handling after multicast flush operations. The issue was fixed by introducing a dedicated flag to avoid races between multicast flush and device down operations.

References

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