CVE-2026-74718: Linux kernel · devlink: fix net namespace reference leak in reload
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 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 22 Aug 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 applied to the Linux kernel devlink component to add the missing put_net() call on the error path in devlink_nl_reload_doit(). Users should update to the fixed kernel versions as provided by their Linux distribution vendors. No additional mitigation steps are indicated.
Description
In the Linux kernel, the following vulnerability has been resolved: devlink: fix net namespace reference leak in reload devlink_nl_reload_doit() calls devlink_netns_get(), which returns a net with a held reference. When the requested namespace differs from the current one and the reload action is not DRIVER_REINIT, the function returns -EOPNOTSUPP without releasing the reference. Add the missing put_net() on this error path.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74718 (opens in a new tab)
- git.kernel.org/stable/c/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd (opens in a new tab)
- git.kernel.org/stable/c/7b02c6d2a3cd2cd669f5c16685779f84328ae60c (opens in a new tab)
- git.kernel.org/stable/c/7b6552e53426ea0539c667bbc5a524fdf7feae6f (opens in a new tab)
- git.kernel.org/stable/c/bf0797b92be591ac71d7c0f610e695caca3c72c9 (opens in a new tab)
- git.kernel.org/stable/c/eda60c85b4f4c7d66b7141a5fe020b1a7f395341 (opens in a new tab)
- ubuntu.com/security/CVE-2026-74718 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74718 (opens in a new tab)
- git.kernel.org/linus/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd (opens in a new tab)