CVE-2026-93278
staging: octeon: add missing napi_disable in cvm_oct_rx_shutdown
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.
INFO
Published Date :
Sept. 24, 2026, 4:17 p.m.
Last Modified :
Sept. 24, 2026, 4:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure NAPI is disabled before calling free_irq.
- Add missing napi_disable call in cvm_oct_rx_shutdown.
- Review error handling for race conditions.
- Apply the patch to the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-93278.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-93278 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-93278
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-93278 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-93278 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 24, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/93xxx/CVE-2026-93278.json">CVE-2026-93278</a> Added Reference https://git.kernel.org/stable/c/158389d7af04bbf0664d91c2ce31fcc9eeace1eb Added Reference https://git.kernel.org/stable/c/89f9f433271fad9351de6a3c713b45b2cfb23e4a Added Reference https://git.kernel.org/stable/c/98f9036b2254c928cb44da0c77dba38f66f7d8f1 Added Reference https://git.kernel.org/stable/c/b2243ffaac14cc3639b5b32a371aac37f96ee554 Added Reference https://git.kernel.org/stable/c/b38fbd68cc36b4f478a1e3cfc169b8616ae1337d Added Reference https://git.kernel.org/stable/c/c0a9a8586a63fda49e61a6b83360feac2a60d898 Added Reference https://git.kernel.org/stable/c/c124049c3a7006fd6caf629139a5722610bbffb4