CVE-2026-93278: Linux kernel · staging: octeon: add missing napi_disable in cvm_oct_rx_shutdown
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 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 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.
Description
In the Linux kernel, the following vulnerability has been resolved: staging: octeon: add missing napi_disable in cvm_oct_rx_shutdown cvm_oct_rx_shutdown calls free_irq and netif_napi_del without disabling the napi instance first. As the free_irq only waits for completion of hard interrupt handlers, the napi poll function could still be active. If cvm_oct_remove proceeds to free the plat structure (which holds the NAPI instances), the active poll function will access freed memory, resulting in a use-after-free crash.
References
- ubuntu.com/security/CVE-2026-93278 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93278 (opens in a new tab)
- git.kernel.org/stable/c/98f9036b2254c928cb44da0c77dba38f66f7d8f1 (opens in a new tab)
- git.kernel.org/stable/c/b2243ffaac14cc3639b5b32a371aac37f96ee554 (opens in a new tab)
- git.kernel.org/stable/c/89f9f433271fad9351de6a3c713b45b2cfb23e4a (opens in a new tab)
- git.kernel.org/stable/c/b38fbd68cc36b4f478a1e3cfc169b8616ae1337d (opens in a new tab)
- git.kernel.org/stable/c/158389d7af04bbf0664d91c2ce31fcc9eeace1eb (opens in a new tab)
- git.kernel.org/stable/c/c124049c3a7006fd6caf629139a5722610bbffb4 (opens in a new tab)
- git.kernel.org/stable/c/c0a9a8586a63fda49e61a6b83360feac2a60d898 (opens in a new tab)