CVE-2026-98014: Linux kernel · net/mlx5: E-Switch, prevent mc_list repopulation during vport disable
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the affected Linux kernel versions by reordering function calls to prevent the multicast list repopulation issue during vport disable. Users should update to patched versions of the linux-hwe-edge kernel to remediate this vulnerability. Since this is a kernel-level issue, applying the official kernel updates from the vendor is the recommended mitigation.
Description
A vulnerability in the Linux kernel's mlx5 driver (E-Switch component) has been resolved that could cause use-after-free and reference count underflow during virtual port disable operations. The issue arises during firmware fatal recovery when certain flow rules are not properly cleared, leading to corrupted flow rule pointers and potential kernel faults. This affects specific versions of the linux-hwe-edge kernel.
References
- ubuntu.com/security/CVE-2026-98014 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98014 (opens in a new tab)
- git.kernel.org/stable/c/c0c6f4ba8a37688f7b4d4044898d88f0450d44c2 (opens in a new tab)
- git.kernel.org/stable/c/72cfcb79026cffb6490f5044153a841d360b0cfc (opens in a new tab)
- git.kernel.org/stable/c/69904608e25e8ba58111aadd9210892cf3876201 (opens in a new tab)
- git.kernel.org/stable/c/668e050429c7ca688cf4e7112f97f0cd269d446b (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98014 (opens in a new tab)
- git.kernel.org/stable/c/2196f9d3358b00fcb28835a5fde14071f51ecb96 (opens in a new tab)
- git.kernel.org/stable/c/413e04adcc1fd263cf02b1b83b4a0dbdc66bcee9 (opens in a new tab)
- git.kernel.org/stable/c/5a2b87dfceccf9065157a14a599d395c2b6281b8 (opens in a new tab)